./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1_true-termination_true-no-overflow.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1_true-termination_true-no-overflow.c -s /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0564e568992a96ba006237c1af458e049de52506 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 00:56:14,773 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 00:56:14,774 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 00:56:14,783 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 00:56:14,783 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 00:56:14,784 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 00:56:14,785 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 00:56:14,786 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 00:56:14,787 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 00:56:14,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 00:56:14,788 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 00:56:14,788 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 00:56:14,789 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 00:56:14,790 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 00:56:14,791 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 00:56:14,791 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 00:56:14,792 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 00:56:14,793 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 00:56:14,794 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 00:56:14,795 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 00:56:14,796 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 00:56:14,797 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 00:56:14,799 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 00:56:14,799 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 00:56:14,799 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 00:56:14,800 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 00:56:14,800 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 00:56:14,801 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 00:56:14,802 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 00:56:14,802 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 00:56:14,802 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 00:56:14,803 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 00:56:14,803 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 00:56:14,803 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 00:56:14,804 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 00:56:14,804 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 00:56:14,804 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2018-12-09 00:56:14,815 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 00:56:14,815 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 00:56:14,815 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 00:56:14,816 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 00:56:14,816 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 00:56:14,817 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 00:56:14,817 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 00:56:14,817 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 00:56:14,817 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 00:56:14,817 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 00:56:14,817 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * Check absence of signed integer overflows=true [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 00:56:14,818 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 00:56:14,818 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 00:56:14,819 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 00:56:14,819 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0564e568992a96ba006237c1af458e049de52506 [2018-12-09 00:56:14,842 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 00:56:14,851 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 00:56:14,854 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 00:56:14,856 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 00:56:14,856 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 00:56:14,856 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/../../sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1_true-termination_true-no-overflow.c [2018-12-09 00:56:14,898 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/data/d506ee50c/90eed05ee82043099a82c9bd609c7361/FLAG87c10d2a4 [2018-12-09 00:56:15,312 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 00:56:15,312 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/sv-benchmarks/c/termination-crafted-lit/HeizmannHoenickeLeikePodelski-ATVA2013-Fig1_true-termination_true-no-overflow.c [2018-12-09 00:56:15,316 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/data/d506ee50c/90eed05ee82043099a82c9bd609c7361/FLAG87c10d2a4 [2018-12-09 00:56:15,323 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/data/d506ee50c/90eed05ee82043099a82c9bd609c7361 [2018-12-09 00:56:15,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 00:56:15,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 00:56:15,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 00:56:15,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 00:56:15,329 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 00:56:15,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49e0d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15, skipping insertion in model container [2018-12-09 00:56:15,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 00:56:15,344 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 00:56:15,430 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:56:15,433 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 00:56:15,441 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 00:56:15,448 INFO L195 MainTranslator]: Completed translation [2018-12-09 00:56:15,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15 WrapperNode [2018-12-09 00:56:15,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 00:56:15,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 00:56:15,449 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 00:56:15,449 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 00:56:15,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 00:56:15,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 00:56:15,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 00:56:15,462 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 00:56:15,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... [2018-12-09 00:56:15,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 00:56:15,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 00:56:15,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 00:56:15,474 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 00:56:15,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 00:56:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 00:56:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 00:56:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 00:56:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 00:56:15,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 00:56:15,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 00:56:15,617 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 00:56:15,617 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-12-09 00:56:15,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:56:15 BoogieIcfgContainer [2018-12-09 00:56:15,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 00:56:15,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 00:56:15,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 00:56:15,620 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 00:56:15,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 12:56:15" (1/3) ... [2018-12-09 00:56:15,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703f8034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:56:15, skipping insertion in model container [2018-12-09 00:56:15,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 12:56:15" (2/3) ... [2018-12-09 00:56:15,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@703f8034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 12:56:15, skipping insertion in model container [2018-12-09 00:56:15,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:56:15" (3/3) ... [2018-12-09 00:56:15,622 INFO L112 eAbstractionObserver]: Analyzing ICFG HeizmannHoenickeLeikePodelski-ATVA2013-Fig1_true-termination_true-no-overflow.c [2018-12-09 00:56:15,627 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 00:56:15,631 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-12-09 00:56:15,641 INFO L257 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2018-12-09 00:56:15,659 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 00:56:15,660 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 00:56:15,660 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 00:56:15,660 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 00:56:15,660 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 00:56:15,660 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 00:56:15,660 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 00:56:15,660 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 00:56:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2018-12-09 00:56:15,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-12-09 00:56:15,673 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:15,674 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:15,675 INFO L423 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:15,678 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:15,678 INFO L82 PathProgramCache]: Analyzing trace with hash -37667266, now seen corresponding path program 1 times [2018-12-09 00:56:15,680 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:15,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,713 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:15,764 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:56:15,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 00:56:15,764 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:56:15,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 00:56:15,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 00:56:15,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 00:56:15,776 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2018-12-09 00:56:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:15,810 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2018-12-09 00:56:15,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 00:56:15,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-12-09 00:56:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:15,817 INFO L225 Difference]: With dead ends: 31 [2018-12-09 00:56:15,817 INFO L226 Difference]: Without dead ends: 17 [2018-12-09 00:56:15,818 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 00:56:15,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-09 00:56:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-12-09 00:56:15,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 00:56:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-09 00:56:15,839 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2018-12-09 00:56:15,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:15,839 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-09 00:56:15,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 00:56:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-09 00:56:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-12-09 00:56:15,839 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:15,840 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:15,840 INFO L423 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:15,840 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1167685199, now seen corresponding path program 1 times [2018-12-09 00:56:15,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:15,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:15,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,841 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:15,860 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:56:15,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 00:56:15,860 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:56:15,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 00:56:15,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 00:56:15,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-12-09 00:56:15,861 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2018-12-09 00:56:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:15,899 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-12-09 00:56:15,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 00:56:15,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-12-09 00:56:15,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:15,900 INFO L225 Difference]: With dead ends: 21 [2018-12-09 00:56:15,900 INFO L226 Difference]: Without dead ends: 19 [2018-12-09 00:56:15,900 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-12-09 00:56:15,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-12-09 00:56:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2018-12-09 00:56:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-12-09 00:56:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-12-09 00:56:15,902 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2018-12-09 00:56:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:15,903 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-12-09 00:56:15,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 00:56:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-12-09 00:56:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 00:56:15,903 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:15,903 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:15,903 INFO L423 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:15,903 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:15,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1159010413, now seen corresponding path program 1 times [2018-12-09 00:56:15,904 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:15,904 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,904 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:15,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,905 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:15,917 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 00:56:15,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 00:56:15,917 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:56:15,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 00:56:15,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 00:56:15,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 00:56:15,918 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 3 states. [2018-12-09 00:56:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:15,926 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-09 00:56:15,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 00:56:15,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 00:56:15,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:15,926 INFO L225 Difference]: With dead ends: 18 [2018-12-09 00:56:15,927 INFO L226 Difference]: Without dead ends: 17 [2018-12-09 00:56:15,927 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 00:56:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-09 00:56:15,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-12-09 00:56:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-09 00:56:15,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-12-09 00:56:15,929 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2018-12-09 00:56:15,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:15,929 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-12-09 00:56:15,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 00:56:15,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-12-09 00:56:15,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-12-09 00:56:15,929 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:15,929 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:15,930 INFO L423 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:15,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1412475851, now seen corresponding path program 1 times [2018-12-09 00:56:15,930 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:15,931 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:15,931 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:15,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:15,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:15,967 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 00:56:15,967 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 13 with the following transitions: [2018-12-09 00:56:15,968 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [14], [15], [17], [19], [21], [27], [28], [29] [2018-12-09 00:56:15,988 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 00:56:15,988 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 00:56:16,077 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 00:56:16,078 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 6 different actions 18 times. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 3. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-12-09 00:56:16,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,083 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 00:56:16,083 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,083 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:56:16,089 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,089 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 00:56:16,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,099 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:56:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,143 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:56:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,196 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-12-09 00:56:16,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 11 [2018-12-09 00:56:16,196 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:56:16,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 00:56:16,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 00:56:16,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-12-09 00:56:16,197 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2018-12-09 00:56:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:16,229 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-12-09 00:56:16,229 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 00:56:16,229 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2018-12-09 00:56:16,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:16,230 INFO L225 Difference]: With dead ends: 18 [2018-12-09 00:56:16,230 INFO L226 Difference]: Without dead ends: 17 [2018-12-09 00:56:16,230 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-12-09 00:56:16,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-12-09 00:56:16,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-12-09 00:56:16,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-09 00:56:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-12-09 00:56:16,232 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 12 [2018-12-09 00:56:16,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:16,232 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-12-09 00:56:16,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 00:56:16,233 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-12-09 00:56:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-12-09 00:56:16,233 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:16,233 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:16,233 INFO L423 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:16,233 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -837078374, now seen corresponding path program 1 times [2018-12-09 00:56:16,233 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:16,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,234 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,255 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,255 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 00:56:16,256 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-12-09 00:56:16,256 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [15], [16], [17], [19], [21], [27], [28], [29] [2018-12-09 00:56:16,257 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 00:56:16,257 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 00:56:16,289 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 00:56:16,289 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 6 different actions 18 times. Never widened. Performed 104 root evaluator evaluations with a maximum evaluation depth of 3. Performed 104 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2018-12-09 00:56:16,293 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,293 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 00:56:16,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,293 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:56:16,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,299 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 00:56:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:56:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,323 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:56:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,356 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 00:56:16,356 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [4] total 9 [2018-12-09 00:56:16,356 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 00:56:16,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 00:56:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 00:56:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-12-09 00:56:16,357 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2018-12-09 00:56:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:16,380 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-12-09 00:56:16,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 00:56:16,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-12-09 00:56:16,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:16,381 INFO L225 Difference]: With dead ends: 16 [2018-12-09 00:56:16,381 INFO L226 Difference]: Without dead ends: 15 [2018-12-09 00:56:16,381 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-12-09 00:56:16,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-12-09 00:56:16,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-12-09 00:56:16,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-12-09 00:56:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-12-09 00:56:16,383 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-12-09 00:56:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:16,383 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-12-09 00:56:16,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 00:56:16,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-12-09 00:56:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-12-09 00:56:16,383 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:16,383 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:16,383 INFO L423 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:16,383 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,384 INFO L82 PathProgramCache]: Analyzing trace with hash -179625769, now seen corresponding path program 1 times [2018-12-09 00:56:16,384 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:16,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,385 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,385 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,400 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 00:56:16,400 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 15 with the following transitions: [2018-12-09 00:56:16,400 INFO L205 CegarAbsIntRunner]: [0], [4], [13], [15], [17], [18], [19], [21], [27], [28], [29] [2018-12-09 00:56:16,401 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 00:56:16,401 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 00:56:16,426 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 00:56:16,427 INFO L272 AbstractInterpreter]: Visited 11 different actions 29 times. Merged at 5 different actions 15 times. Never widened. Performed 101 root evaluator evaluations with a maximum evaluation depth of 3. Performed 101 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 2 fixpoints after 2 different actions. Largest state had 3 variables. [2018-12-09 00:56:16,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,428 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 00:56:16,428 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,428 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:56:16,436 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,437 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 00:56:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,442 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:56:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,444 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:56:16,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 00:56:16,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2018-12-09 00:56:16,479 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 00:56:16,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 00:56:16,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 00:56:16,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 00:56:16,480 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 4 states. [2018-12-09 00:56:16,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:16,501 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-12-09 00:56:16,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-12-09 00:56:16,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2018-12-09 00:56:16,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:16,502 INFO L225 Difference]: With dead ends: 22 [2018-12-09 00:56:16,502 INFO L226 Difference]: Without dead ends: 21 [2018-12-09 00:56:16,502 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2018-12-09 00:56:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-12-09 00:56:16,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2018-12-09 00:56:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-12-09 00:56:16,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-12-09 00:56:16,505 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 14 [2018-12-09 00:56:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:16,506 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-12-09 00:56:16,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 00:56:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-12-09 00:56:16,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 00:56:16,506 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 00:56:16,506 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-09 00:56:16,507 INFO L423 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2018-12-09 00:56:16,507 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 00:56:16,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1368541440, now seen corresponding path program 2 times [2018-12-09 00:56:16,507 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 00:56:16,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 00:56:16,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 00:56:16,508 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 00:56:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 00:56:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,535 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 00:56:16,535 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 00:56:16,535 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 00:56:16,535 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 00:56:16,536 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 00:56:16,542 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 00:56:16,542 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 00:56:16,552 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-09 00:56:16,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 00:56:16,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 00:56:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,608 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 00:56:16,653 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 00:56:16,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 00:56:16,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2018-12-09 00:56:16,667 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 00:56:16,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 00:56:16,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 00:56:16,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-12-09 00:56:16,668 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 10 states. [2018-12-09 00:56:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 00:56:16,792 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-09 00:56:16,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-09 00:56:16,792 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2018-12-09 00:56:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 00:56:16,792 INFO L225 Difference]: With dead ends: 27 [2018-12-09 00:56:16,792 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 00:56:16,793 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2018-12-09 00:56:16,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 00:56:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 00:56:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 00:56:16,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 00:56:16,794 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2018-12-09 00:56:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 00:56:16,794 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 00:56:16,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 00:56:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 00:56:16,794 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 00:56:16,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-12-09 00:56:16,844 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-12-09 00:56:16,845 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point L19(line 19) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point L19-1(line 19) no Hoare annotation was computed. [2018-12-09 00:56:16,845 INFO L448 ceAbstractionStarter]: For program point L18-1(line 18) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L444 ceAbstractionStarter]: At program point L17-2(lines 17 20) the Hoare annotation is: (let ((.cse0 (<= 24 main_~y~0))) (or (and (<= 23 main_~y~0) (<= main_~y~0 23) (<= main_~x~0 (+ main_~y~0 2147483624))) (and (<= main_~y~0 24) .cse0 (<= main_~x~0 2147483624)) (and (<= main_~y~0 2147483647) .cse0 (<= (+ main_~x~0 main_~y~0) 2147483625)))) [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point L17-3(lines 17 20) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point mainErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point mainErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 19) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point mainErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2018-12-09 00:56:16,846 INFO L448 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 18) no Hoare annotation was computed. [2018-12-09 00:56:16,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 12:56:16 BoogieIcfgContainer [2018-12-09 00:56:16,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 00:56:16,854 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 00:56:16,854 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 00:56:16,854 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 00:56:16,854 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 12:56:15" (3/4) ... [2018-12-09 00:56:16,857 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 00:56:16,860 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 00:56:16,860 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 00:56:16,863 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2018-12-09 00:56:16,863 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 00:56:16,863 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 00:56:16,885 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_34247fd9-0fd1-454b-b225-314884ce5416/bin-2019/utaipan/witness.graphml [2018-12-09 00:56:16,885 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 00:56:16,886 INFO L168 Benchmark]: Toolchain (without parser) took 1560.29 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 956.0 MB in the beginning and 901.3 MB in the end (delta: 54.7 MB). Peak memory consumption was 185.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:56:16,886 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:56:16,887 INFO L168 Benchmark]: CACSL2BoogieTranslator took 122.19 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 00:56:16,887 INFO L168 Benchmark]: Boogie Procedure Inliner took 13.09 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:56:16,887 INFO L168 Benchmark]: Boogie Preprocessor took 11.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 00:56:16,887 INFO L168 Benchmark]: RCFGBuilder took 143.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -166.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. [2018-12-09 00:56:16,888 INFO L168 Benchmark]: TraceAbstraction took 1235.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 908.1 MB in the end (delta: 203.2 MB). Peak memory consumption was 203.2 MB. Max. memory is 11.5 GB. [2018-12-09 00:56:16,888 INFO L168 Benchmark]: Witness Printer took 31.43 ms. Allocated memory is still 1.2 GB. Free memory was 908.1 MB in the beginning and 901.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-12-09 00:56:16,889 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 122.19 ms. Allocated memory is still 1.0 GB. Free memory was 956.0 MB in the beginning and 945.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 13.09 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.49 ms. Allocated memory is still 1.0 GB. Free memory is still 945.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 143.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.1 MB). Free memory was 945.3 MB in the beginning and 1.1 GB in the end (delta: -166.1 MB). Peak memory consumption was 12.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1235.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 908.1 MB in the end (delta: 203.2 MB). Peak memory consumption was 203.2 MB. Max. memory is 11.5 GB. * Witness Printer took 31.43 ms. Allocated memory is still 1.2 GB. Free memory was 908.1 MB in the beginning and 901.3 MB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 18]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 19]: 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: 17]: Loop Invariant Derived loop invariant: (((23 <= y && y <= 23) && x <= y + 2147483624) || ((y <= 24 && 24 <= y) && x <= 2147483624)) || ((y <= 2147483647 && 24 <= y) && x + y <= 2147483625) - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 4 error locations. SAFE Result, 1.1s OverallTime, 7 OverallIterations, 3 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 52 SDtfs, 47 SDslu, 72 SDs, 0 SdLazy, 142 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 147 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 3 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 9 NumberOfFragments, 39 HoareAnnotationTreeSize, 5 FomulaSimplifications, 42 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 18 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 141 NumberOfCodeBlocks, 141 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 7252 SizeOfPredicates, 7 NumberOfNonLiveVariables, 126 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 8/66 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...