./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/EvenOdd01-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer --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 Automizer --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 0.1.24-cad4683 [2019-10-22 08:59:16,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:16,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:16,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:16,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:16,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:16,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:16,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:16,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:16,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:16,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:16,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:16,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:16,435 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:16,436 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:16,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:16,437 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:16,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:16,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:16,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:16,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:16,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:16,444 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:16,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:16,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:16,447 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:16,448 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:16,448 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:16,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:16,449 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:16,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:16,450 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:16,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:16,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:16,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:16,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:16,453 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:16,453 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:16,454 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:16,454 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:16,455 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:16,456 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/config/svcomp-Overflow-32bit-Automizer_Default.epf [2019-10-22 08:59:16,466 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:16,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:16,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:16,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:16,468 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:16,468 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:16,468 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:16,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:16,470 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:16,470 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2019-10-22 08:59:16,470 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:16,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:16,470 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:16,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:16,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:16,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:16,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:16,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:16,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:16,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:16,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:16,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:16,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:59:16,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:59:16,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:16,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bec5669c6fe02e51518958076fea4487ada345cf [2019-10-22 08:59:16,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:16,508 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:16,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:16,512 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:16,512 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:16,513 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/../../sv-benchmarks/c/recursive/EvenOdd01-1.c [2019-10-22 08:59:16,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/data/22d0a15f5/01542cb737cf4ebe93d67d7b15c5e06f/FLAGb8bf450ec [2019-10-22 08:59:16,956 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:16,956 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/sv-benchmarks/c/recursive/EvenOdd01-1.c [2019-10-22 08:59:16,960 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/data/22d0a15f5/01542cb737cf4ebe93d67d7b15c5e06f/FLAGb8bf450ec [2019-10-22 08:59:17,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/data/22d0a15f5/01542cb737cf4ebe93d67d7b15c5e06f [2019-10-22 08:59:17,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:17,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:17,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:17,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:17,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:17,369 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@acd6315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17, skipping insertion in model container [2019-10-22 08:59:17,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,377 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:17,394 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:17,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:17,558 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:17,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:17,643 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:17,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17 WrapperNode [2019-10-22 08:59:17,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:17,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:17,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:17,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:17,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:17,674 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:17,674 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:17,674 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:17,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... [2019-10-22 08:59:17,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:17,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:17,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:17,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:17,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:17,748 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2019-10-22 08:59:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2019-10-22 08:59:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2019-10-22 08:59:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2019-10-22 08:59:17,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:17,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:17,909 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:17,909 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-22 08:59:17,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:17 BoogieIcfgContainer [2019-10-22 08:59:17,910 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:17,911 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:17,911 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:17,914 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:17,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:17" (1/3) ... [2019-10-22 08:59:17,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69743da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:17, skipping insertion in model container [2019-10-22 08:59:17,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:17" (2/3) ... [2019-10-22 08:59:17,915 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69743da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:17, skipping insertion in model container [2019-10-22 08:59:17,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:17" (3/3) ... [2019-10-22 08:59:17,917 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2019-10-22 08:59:17,926 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:17,932 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2019-10-22 08:59:17,942 INFO L249 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2019-10-22 08:59:17,976 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:17,976 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:17,976 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:17,977 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:17,977 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:17,977 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:17,977 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:17,977 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-22 08:59:18,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 08:59:18,021 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,021 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,023 INFO L410 AbstractCegarLoop]: === Iteration 1 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:18,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash 2104858774, now seen corresponding path program 1 times [2019-10-22 08:59:18,049 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685654411] [2019-10-22 08:59:18,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,050 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685654411] [2019-10-22 08:59:18,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:18,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-22 08:59:18,191 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824395546] [2019-10-22 08:59:18,195 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:59:18,195 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:59:18,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:18,206 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 5 states. [2019-10-22 08:59:18,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,304 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2019-10-22 08:59:18,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:59:18,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-10-22 08:59:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,313 INFO L225 Difference]: With dead ends: 47 [2019-10-22 08:59:18,313 INFO L226 Difference]: Without dead ends: 26 [2019-10-22 08:59:18,316 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-22 08:59:18,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-10-22 08:59:18,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-22 08:59:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-22 08:59:18,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 7 [2019-10-22 08:59:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:18,349 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-22 08:59:18,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:59:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-22 08:59:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:59:18,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,349 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,350 INFO L410 AbstractCegarLoop]: === Iteration 2 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:18,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,350 INFO L82 PathProgramCache]: Analyzing trace with hash 826112612, now seen corresponding path program 1 times [2019-10-22 08:59:18,350 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123087969] [2019-10-22 08:59:18,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123087969] [2019-10-22 08:59:18,380 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:18,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:59:18,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050911397] [2019-10-22 08:59:18,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:59:18,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:59:18,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:18,383 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 5 states. [2019-10-22 08:59:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,416 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-22 08:59:18,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 08:59:18,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-10-22 08:59:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,417 INFO L225 Difference]: With dead ends: 26 [2019-10-22 08:59:18,417 INFO L226 Difference]: Without dead ends: 25 [2019-10-22 08:59:18,418 INFO L600 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 [2019-10-22 08:59:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-22 08:59:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-10-22 08:59:18,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-22 08:59:18,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-22 08:59:18,422 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 8 [2019-10-22 08:59:18,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:18,422 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-22 08:59:18,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:59:18,422 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-22 08:59:18,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-22 08:59:18,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,423 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,423 INFO L410 AbstractCegarLoop]: === Iteration 3 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:18,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,424 INFO L82 PathProgramCache]: Analyzing trace with hash -345822603, now seen corresponding path program 1 times [2019-10-22 08:59:18,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116446677] [2019-10-22 08:59:18,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116446677] [2019-10-22 08:59:18,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:18,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:59:18,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807069265] [2019-10-22 08:59:18,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:59:18,502 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:59:18,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:18,503 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 7 states. [2019-10-22 08:59:18,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,602 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-22 08:59:18,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:59:18,603 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-10-22 08:59:18,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,603 INFO L225 Difference]: With dead ends: 24 [2019-10-22 08:59:18,604 INFO L226 Difference]: Without dead ends: 22 [2019-10-22 08:59:18,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:18,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-22 08:59:18,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-22 08:59:18,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-22 08:59:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-22 08:59:18,610 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2019-10-22 08:59:18,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:18,611 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-22 08:59:18,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:59:18,611 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-22 08:59:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-22 08:59:18,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,612 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,612 INFO L410 AbstractCegarLoop]: === Iteration 4 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:18,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,612 INFO L82 PathProgramCache]: Analyzing trace with hash -2130566059, now seen corresponding path program 1 times [2019-10-22 08:59:18,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,613 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934770882] [2019-10-22 08:59:18,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934770882] [2019-10-22 08:59:18,666 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:18,666 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 08:59:18,667 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521201005] [2019-10-22 08:59:18,667 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-22 08:59:18,667 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-22 08:59:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-22 08:59:18,668 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2019-10-22 08:59:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,739 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-22 08:59:18,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 08:59:18,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-22 08:59:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,740 INFO L225 Difference]: With dead ends: 30 [2019-10-22 08:59:18,740 INFO L226 Difference]: Without dead ends: 29 [2019-10-22 08:59:18,740 INFO L600 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 [2019-10-22 08:59:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-22 08:59:18,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-22 08:59:18,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-22 08:59:18,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-22 08:59:18,750 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 14 [2019-10-22 08:59:18,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:18,750 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-22 08:59:18,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-22 08:59:18,750 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-22 08:59:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-22 08:59:18,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:18,751 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:18,751 INFO L410 AbstractCegarLoop]: === Iteration 5 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:18,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1256120232, now seen corresponding path program 1 times [2019-10-22 08:59:18,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:18,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128780031] [2019-10-22 08:59:18,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:18,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,821 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128780031] [2019-10-22 08:59:18,822 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684618603] [2019-10-22 08:59:18,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:18,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:59:18,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:18,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:18,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-10-22 08:59:18,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464942041] [2019-10-22 08:59:18,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 08:59:18,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:18,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 08:59:18,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:18,901 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 9 states. [2019-10-22 08:59:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:18,993 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-22 08:59:18,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:59:18,994 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2019-10-22 08:59:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:18,995 INFO L225 Difference]: With dead ends: 36 [2019-10-22 08:59:18,995 INFO L226 Difference]: Without dead ends: 35 [2019-10-22 08:59:18,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 08:59:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-22 08:59:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-22 08:59:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-22 08:59:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-22 08:59:19,001 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 20 [2019-10-22 08:59:19,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:19,001 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-22 08:59:19,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 08:59:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-22 08:59:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-22 08:59:19,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:19,002 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:59:19,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:19,204 INFO L410 AbstractCegarLoop]: === Iteration 6 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:19,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash 507937609, now seen corresponding path program 1 times [2019-10-22 08:59:19,205 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:19,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605266050] [2019-10-22 08:59:19,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:19,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:19,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605266050] [2019-10-22 08:59:19,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526480344] [2019-10-22 08:59:19,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:59:19,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:19,344 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:19,344 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-10-22 08:59:19,344 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292085819] [2019-10-22 08:59:19,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 08:59:19,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 08:59:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:59:19,345 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 11 states. [2019-10-22 08:59:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:19,469 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-22 08:59:19,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 08:59:19,470 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-22 08:59:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:19,470 INFO L225 Difference]: With dead ends: 42 [2019-10-22 08:59:19,471 INFO L226 Difference]: Without dead ends: 41 [2019-10-22 08:59:19,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:59:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-22 08:59:19,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2019-10-22 08:59:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-22 08:59:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-22 08:59:19,477 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 26 [2019-10-22 08:59:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:19,478 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-22 08:59:19,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 08:59:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-22 08:59:19,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-22 08:59:19,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:19,479 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2019-10-22 08:59:19,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:19,680 INFO L410 AbstractCegarLoop]: === Iteration 7 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:19,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:19,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1150777420, now seen corresponding path program 2 times [2019-10-22 08:59:19,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:19,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119016589] [2019-10-22 08:59:19,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:19,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:19,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119016589] [2019-10-22 08:59:19,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114420416] [2019-10-22 08:59:19,828 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:19,860 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:19,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:19,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 08:59:19,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:19,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:19,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2019-10-22 08:59:19,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714473799] [2019-10-22 08:59:19,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 08:59:19,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:19,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 08:59:19,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-22 08:59:19,876 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 13 states. [2019-10-22 08:59:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:20,029 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-22 08:59:20,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 08:59:20,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2019-10-22 08:59:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:20,031 INFO L225 Difference]: With dead ends: 48 [2019-10-22 08:59:20,031 INFO L226 Difference]: Without dead ends: 47 [2019-10-22 08:59:20,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2019-10-22 08:59:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-22 08:59:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-22 08:59:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-22 08:59:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-22 08:59:20,039 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 32 [2019-10-22 08:59:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:20,039 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-22 08:59:20,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 08:59:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-22 08:59:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-22 08:59:20,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:20,040 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2019-10-22 08:59:20,241 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:20,241 INFO L410 AbstractCegarLoop]: === Iteration 8 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:20,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:20,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1724912701, now seen corresponding path program 2 times [2019-10-22 08:59:20,242 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:20,242 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204959665] [2019-10-22 08:59:20,242 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:20,243 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:20,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:20,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204959665] [2019-10-22 08:59:20,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534428594] [2019-10-22 08:59:20,384 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:20,420 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:20,420 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:20,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-22 08:59:20,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:20,443 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:20,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2019-10-22 08:59:20,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027638164] [2019-10-22 08:59:20,447 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 08:59:20,447 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:20,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 08:59:20,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-10-22 08:59:20,447 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 15 states. [2019-10-22 08:59:20,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:20,623 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-22 08:59:20,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-22 08:59:20,626 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2019-10-22 08:59:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:20,629 INFO L225 Difference]: With dead ends: 54 [2019-10-22 08:59:20,630 INFO L226 Difference]: Without dead ends: 53 [2019-10-22 08:59:20,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2019-10-22 08:59:20,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-10-22 08:59:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2019-10-22 08:59:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-22 08:59:20,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2019-10-22 08:59:20,639 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 38 [2019-10-22 08:59:20,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:20,639 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2019-10-22 08:59:20,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 08:59:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2019-10-22 08:59:20,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-22 08:59:20,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:20,640 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2019-10-22 08:59:20,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:20,845 INFO L410 AbstractCegarLoop]: === Iteration 9 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:20,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:20,845 INFO L82 PathProgramCache]: Analyzing trace with hash 790987328, now seen corresponding path program 3 times [2019-10-22 08:59:20,845 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:20,845 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53983636] [2019-10-22 08:59:20,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:20,846 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:20,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:21,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53983636] [2019-10-22 08:59:21,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590827568] [2019-10-22 08:59:21,006 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:21,037 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:59:21,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:21,038 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 08:59:21,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:21,058 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:21,058 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:21,058 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2019-10-22 08:59:21,058 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266682984] [2019-10-22 08:59:21,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 08:59:21,059 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:21,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 08:59:21,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2019-10-22 08:59:21,060 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 17 states. [2019-10-22 08:59:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:21,278 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2019-10-22 08:59:21,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-22 08:59:21,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2019-10-22 08:59:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:21,280 INFO L225 Difference]: With dead ends: 60 [2019-10-22 08:59:21,280 INFO L226 Difference]: Without dead ends: 59 [2019-10-22 08:59:21,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2019-10-22 08:59:21,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-22 08:59:21,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2019-10-22 08:59:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-22 08:59:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2019-10-22 08:59:21,292 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 44 [2019-10-22 08:59:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:21,293 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2019-10-22 08:59:21,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 08:59:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2019-10-22 08:59:21,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-22 08:59:21,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:21,294 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2019-10-22 08:59:21,497 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:21,497 INFO L410 AbstractCegarLoop]: === Iteration 10 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 845403953, now seen corresponding path program 3 times [2019-10-22 08:59:21,498 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:21,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386065543] [2019-10-22 08:59:21,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:21,498 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:21,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:21,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386065543] [2019-10-22 08:59:21,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102051830] [2019-10-22 08:59:21,680 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:21,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-22 08:59:21,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:21,706 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 08:59:21,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:21,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:21,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2019-10-22 08:59:21,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988119414] [2019-10-22 08:59:21,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 08:59:21,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:21,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 08:59:21,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2019-10-22 08:59:21,723 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 19 states. [2019-10-22 08:59:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:21,925 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2019-10-22 08:59:21,925 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-22 08:59:21,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2019-10-22 08:59:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:21,926 INFO L225 Difference]: With dead ends: 66 [2019-10-22 08:59:21,926 INFO L226 Difference]: Without dead ends: 65 [2019-10-22 08:59:21,927 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2019-10-22 08:59:21,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-10-22 08:59:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2019-10-22 08:59:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-22 08:59:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2019-10-22 08:59:21,935 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 50 [2019-10-22 08:59:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:21,935 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2019-10-22 08:59:21,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 08:59:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2019-10-22 08:59:21,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-22 08:59:21,936 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:21,936 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2019-10-22 08:59:22,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:22,137 INFO L410 AbstractCegarLoop]: === Iteration 11 === [isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2019-10-22 08:59:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:22,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1529856460, now seen corresponding path program 4 times [2019-10-22 08:59:22,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:22,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096275814] [2019-10-22 08:59:22,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:22,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:22,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:22,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096275814] [2019-10-22 08:59:22,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565408508] [2019-10-22 08:59:22,364 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:22,389 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 08:59:22,389 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:22,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-22 08:59:22,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-22 08:59:22,516 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:22,517 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 24 [2019-10-22 08:59:22,517 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386862298] [2019-10-22 08:59:22,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-22 08:59:22,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:22,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-22 08:59:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2019-10-22 08:59:22,518 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 25 states. [2019-10-22 08:59:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:22,628 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2019-10-22 08:59:22,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-22 08:59:22,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2019-10-22 08:59:22,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:22,629 INFO L225 Difference]: With dead ends: 64 [2019-10-22 08:59:22,629 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:59:22,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2019-10-22 08:59:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:59:22,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:59:22,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:59:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:59:22,630 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2019-10-22 08:59:22,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:22,631 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:59:22,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-22 08:59:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:59:22,631 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:59:22,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:22,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:59:23,010 INFO L443 ceAbstractionStarter]: For program point L32(line 32) no Hoare annotation was computed. [2019-10-22 08:59:23,010 INFO L443 ceAbstractionStarter]: For program point isEvenErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2019-10-22 08:59:23,010 INFO L443 ceAbstractionStarter]: For program point L32-1(line 32) no Hoare annotation was computed. [2019-10-22 08:59:23,010 INFO L443 ceAbstractionStarter]: For program point isEvenErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 32) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L439 ceAbstractionStarter]: At program point L32-2(line 32) the Hoare annotation is: (or (not (<= 1 |isEven_#in~n|)) (not (<= |isEven_#in~n| 2147483646)) (and (<= 1 isEven_~n) (<= isEven_~n 2147483646))) [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point L29(lines 29 33) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point L32-3(line 32) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point L27(lines 27 33) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L446 ceAbstractionStarter]: At program point isEvenENTRY(lines 26 34) the Hoare annotation is: true [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point isEvenEXIT(lines 26 34) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point isEvenFINAL(lines 26 34) no Hoare annotation was computed. [2019-10-22 08:59:23,011 INFO L443 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point L22-1(line 22) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L439 ceAbstractionStarter]: At program point L22-2(line 22) the Hoare annotation is: (or (and (<= isOdd_~n 2147483647) (not (= isOdd_~n 0)) (<= 0 isOdd_~n) (not (= isOdd_~n 1))) (not (<= |isOdd_#in~n| 2147483647)) (not (<= 0 |isOdd_#in~n|))) [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point L19(lines 19 23) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point L22-3(line 22) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point L17(lines 17 23) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point isOddFINAL(lines 16 24) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L446 ceAbstractionStarter]: At program point isOddENTRY(lines 16 24) the Hoare annotation is: true [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point isOddErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-10-22 08:59:23,012 INFO L443 ceAbstractionStarter]: For program point isOddErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point isOddEXIT(lines 16 24) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point L47(line 47) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point L44(lines 44 48) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L439 ceAbstractionStarter]: At program point L42(line 42) the Hoare annotation is: (and (<= ULTIMATE.start_main_~n~0 2147483647) (<= 0 ULTIMATE.start_main_~n~0)) [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point L42-1(line 42) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L443 ceAbstractionStarter]: For program point L39(lines 39 41) no Hoare annotation was computed. [2019-10-22 08:59:23,013 INFO L439 ceAbstractionStarter]: At program point L37(lines 37 49) the Hoare annotation is: (<= ULTIMATE.start_main_~n~0 2147483647) [2019-10-22 08:59:23,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:23 BoogieIcfgContainer [2019-10-22 08:59:23,026 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:23,026 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:23,026 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:23,027 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:23,027 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:17" (3/4) ... [2019-10-22 08:59:23,030 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:59:23,036 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isEven [2019-10-22 08:59:23,036 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isOdd [2019-10-22 08:59:23,040 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-10-22 08:59:23,041 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:59:23,081 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_a03aac54-58c8-4db8-b4d4-f20c723689a0/bin/uautomizer/witness.graphml [2019-10-22 08:59:23,081 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:23,083 INFO L168 Benchmark]: Toolchain (without parser) took 5721.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 186.6 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -176.0 MB). Peak memory consumption was 10.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:23,084 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:23,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -189.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:23,084 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:23,085 INFO L168 Benchmark]: Boogie Preprocessor took 16.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:23,085 INFO L168 Benchmark]: RCFGBuilder took 220.18 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:23,086 INFO L168 Benchmark]: TraceAbstraction took 5115.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:23,086 INFO L168 Benchmark]: Witness Printer took 55.08 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: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:23,088 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 279.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 137.9 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -189.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.11 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 220.18 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: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5115.18 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -14.4 MB). Peak memory consumption was 34.4 MB. Max. memory is 11.5 GB. * Witness Printer took 55.08 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: 8.1 MB). Peak memory consumption was 8.1 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 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: n <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 4 error locations. Result: SAFE, OverallTime: 5.0s, OverallIterations: 11, TraceHistogramMax: 5, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, HoareTripleCheckerStatistics: 97 SDtfs, 273 SDslu, 681 SDs, 0 SdLazy, 1065 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 418 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 11 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 22 PreInvPairs, 23 NumberOfFragments, 52 HoareAnnotationTreeSize, 22 FomulaSimplifications, 988 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 362 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 574 NumberOfCodeBlocks, 574 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 556 ConstructedInterpolants, 0 QuantifiedInterpolants, 99740 SizeOfPredicates, 42 NumberOfNonLiveVariables, 469 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 18 InterpolantComputations, 4 PerfectInterpolantSequences, 80/568 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...