./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_true-unreach-call2_true-termination.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_true-unreach-call2_true-termination.i -s /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2797de73b923a7fbf0f091cb97be1331c2699e2c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-22 23:01:46,776 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-22 23:01:46,777 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-22 23:01:46,786 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-22 23:01:46,786 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-22 23:01:46,787 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-22 23:01:46,788 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-22 23:01:46,789 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-22 23:01:46,790 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-22 23:01:46,791 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-22 23:01:46,792 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-22 23:01:46,793 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-22 23:01:46,793 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-22 23:01:46,794 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-22 23:01:46,795 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-22 23:01:46,795 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-22 23:01:46,796 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-22 23:01:46,798 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-22 23:01:46,799 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-22 23:01:46,801 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-22 23:01:46,801 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-22 23:01:46,802 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-22 23:01:46,804 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-22 23:01:46,805 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-22 23:01:46,805 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-22 23:01:46,805 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-22 23:01:46,806 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-22 23:01:46,807 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-22 23:01:46,807 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-22 23:01:46,809 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-22 23:01:46,809 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-22 23:01:46,809 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-22 23:01:46,810 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-22 23:01:46,810 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-22 23:01:46,810 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-22 23:01:46,811 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-22 23:01:46,811 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-22 23:01:46,823 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-22 23:01:46,823 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-22 23:01:46,824 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-22 23:01:46,824 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-22 23:01:46,824 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-22 23:01:46,824 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-22 23:01:46,824 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-22 23:01:46,824 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-22 23:01:46,824 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-22 23:01:46,825 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-22 23:01:46,825 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-22 23:01:46,825 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-22 23:01:46,825 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-22 23:01:46,825 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-22 23:01:46,826 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-22 23:01:46,827 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-22 23:01:46,827 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-22 23:01:46,827 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-22 23:01:46,827 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-22 23:01:46,827 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-22 23:01:46,827 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-22 23:01:46,828 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-22 23:01:46,829 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-22 23:01:46,830 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-22 23:01:46,830 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-22 23:01:46,830 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-22 23:01:46,830 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-22 23:01:46,830 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-22 23:01:46,830 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-22 23:01:46,831 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-22 23:01:46,831 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-22 23:01:46,831 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_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2797de73b923a7fbf0f091cb97be1331c2699e2c [2018-11-22 23:01:46,855 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-22 23:01:46,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-22 23:01:46,867 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-22 23:01:46,869 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-22 23:01:46,869 INFO L276 PluginConnector]: CDTParser initialized [2018-11-22 23:01:46,869 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/../../sv-benchmarks/c/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-11-22 23:01:46,910 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/data/7a1b50744/02a8bc3879fb43fa919fe2eee7de5699/FLAG5a28648f2 [2018-11-22 23:01:47,240 INFO L307 CDTParser]: Found 1 translation units. [2018-11-22 23:01:47,240 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/sv-benchmarks/c/loop-acceleration/underapprox_true-unreach-call2_true-termination.i [2018-11-22 23:01:47,244 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/data/7a1b50744/02a8bc3879fb43fa919fe2eee7de5699/FLAG5a28648f2 [2018-11-22 23:01:47,672 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/data/7a1b50744/02a8bc3879fb43fa919fe2eee7de5699 [2018-11-22 23:01:47,674 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-22 23:01:47,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-22 23:01:47,675 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-22 23:01:47,675 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-22 23:01:47,678 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-22 23:01:47,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578ae41f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47, skipping insertion in model container [2018-11-22 23:01:47,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,686 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-22 23:01:47,697 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-22 23:01:47,813 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:01:47,815 INFO L191 MainTranslator]: Completed pre-run [2018-11-22 23:01:47,824 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-22 23:01:47,832 INFO L195 MainTranslator]: Completed translation [2018-11-22 23:01:47,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47 WrapperNode [2018-11-22 23:01:47,832 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-22 23:01:47,833 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-22 23:01:47,833 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-22 23:01:47,833 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-22 23:01:47,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-22 23:01:47,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-22 23:01:47,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-22 23:01:47,846 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-22 23:01:47,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,854 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,857 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... [2018-11-22 23:01:47,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-22 23:01:47,858 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-22 23:01:47,858 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-22 23:01:47,859 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-22 23:01:47,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 [2018-11-22 23:01:47,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-22 23:01:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-22 23:01:47,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-22 23:01:47,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-22 23:01:47,943 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-22 23:01:47,943 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-22 23:01:47,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-22 23:01:47,943 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-22 23:01:48,031 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-22 23:01:48,031 INFO L280 CfgBuilder]: Removed 1 assue(true) statements. [2018-11-22 23:01:48,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:01:48 BoogieIcfgContainer [2018-11-22 23:01:48,031 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-22 23:01:48,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-22 23:01:48,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-22 23:01:48,033 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-22 23:01:48,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 11:01:47" (1/3) ... [2018-11-22 23:01:48,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40edfd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:01:48, skipping insertion in model container [2018-11-22 23:01:48,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 11:01:47" (2/3) ... [2018-11-22 23:01:48,034 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40edfd55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 11:01:48, skipping insertion in model container [2018-11-22 23:01:48,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:01:48" (3/3) ... [2018-11-22 23:01:48,036 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_true-unreach-call2_true-termination.i [2018-11-22 23:01:48,042 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-22 23:01:48,046 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-22 23:01:48,056 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-22 23:01:48,075 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-22 23:01:48,075 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-22 23:01:48,075 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-22 23:01:48,075 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-22 23:01:48,075 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-22 23:01:48,075 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-22 23:01:48,075 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-22 23:01:48,076 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-22 23:01:48,090 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2018-11-22 23:01:48,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-22 23:01:48,095 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:48,095 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:48,097 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:48,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:48,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2018-11-22 23:01:48,102 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:48,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,132 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:48,133 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,133 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,222 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-22 23:01:48,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-22 23:01:48,223 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:01:48,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-22 23:01:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-22 23:01:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 23:01:48,235 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2018-11-22 23:01:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:48,254 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2018-11-22 23:01:48,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-22 23:01:48,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-11-22 23:01:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:48,260 INFO L225 Difference]: With dead ends: 29 [2018-11-22 23:01:48,260 INFO L226 Difference]: Without dead ends: 12 [2018-11-22 23:01:48,262 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-22 23:01:48,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-22 23:01:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-22 23:01:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-22 23:01:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-11-22 23:01:48,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-11-22 23:01:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:48,289 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-11-22 23:01:48,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-22 23:01:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-11-22 23:01:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-22 23:01:48,289 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:48,289 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:48,290 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:48,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:48,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2018-11-22 23:01:48,290 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:48,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,291 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:48,291 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,291 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,344 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,345 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:01:48,345 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2018-11-22 23:01:48,347 INFO L202 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2018-11-22 23:01:48,372 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-22 23:01:48,372 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-22 23:01:48,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-22 23:01:48,470 INFO L272 AbstractInterpreter]: Visited 11 different actions 17 times. Merged at 1 different actions 3 times. Never widened. Performed 61 root evaluator evaluations with a maximum evaluation depth of 5. Performed 61 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 2 fixpoints after 2 different actions. Largest state had 3 variables. [2018-11-22 23:01:48,475 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:48,475 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-22 23:01:48,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,476 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 [2018-11-22 23:01:48,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:48,483 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:01:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:48,501 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:01:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,522 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:01:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:01:48,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2018-11-22 23:01:48,642 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:01:48,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-22 23:01:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-22 23:01:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-11-22 23:01:48,643 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2018-11-22 23:01:48,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:48,654 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-11-22 23:01:48,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-22 23:01:48,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-22 23:01:48,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:48,656 INFO L225 Difference]: With dead ends: 18 [2018-11-22 23:01:48,656 INFO L226 Difference]: Without dead ends: 13 [2018-11-22 23:01:48,656 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-11-22 23:01:48,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-11-22 23:01:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-11-22 23:01:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-11-22 23:01:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-11-22 23:01:48,659 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-11-22 23:01:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:48,660 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-11-22 23:01:48,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-22 23:01:48,660 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-11-22 23:01:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-22 23:01:48,660 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:48,660 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:48,661 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:48,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2018-11-22 23:01:48,661 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:48,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,662 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,711 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:01:48,711 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:01:48,711 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:01:48,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,712 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 [2018-11-22 23:01:48,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:01:48,719 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:01:48,728 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-22 23:01:48,728 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:01:48,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:01:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,769 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:01:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:01:48,856 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2018-11-22 23:01:48,856 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:01:48,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 23:01:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 23:01:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-22 23:01:48,857 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2018-11-22 23:01:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:48,875 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-11-22 23:01:48,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-22 23:01:48,875 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2018-11-22 23:01:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:48,875 INFO L225 Difference]: With dead ends: 19 [2018-11-22 23:01:48,876 INFO L226 Difference]: Without dead ends: 14 [2018-11-22 23:01:48,876 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-22 23:01:48,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-22 23:01:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-22 23:01:48,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-22 23:01:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-11-22 23:01:48,879 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-11-22 23:01:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:48,879 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-11-22 23:01:48,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 23:01:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-11-22 23:01:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-22 23:01:48,880 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:48,880 INFO L402 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:48,880 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:48,881 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:48,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1004266255, now seen corresponding path program 3 times [2018-11-22 23:01:48,881 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:01:48,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:48,882 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:48,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,973 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:01:48,973 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:01:48,973 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:01:48,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:48,973 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 [2018-11-22 23:01:48,982 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-22 23:01:48,982 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-22 23:01:48,990 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-22 23:01:48,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:01:48,991 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:01:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,027 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:01:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:01:49,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 9] total 14 [2018-11-22 23:01:49,203 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:01:49,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-22 23:01:49,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-22 23:01:49,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-22 23:01:49,204 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 7 states. [2018-11-22 23:01:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:49,230 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-11-22 23:01:49,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 23:01:49,231 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2018-11-22 23:01:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:49,231 INFO L225 Difference]: With dead ends: 20 [2018-11-22 23:01:49,231 INFO L226 Difference]: Without dead ends: 15 [2018-11-22 23:01:49,231 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-11-22 23:01:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-22 23:01:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-22 23:01:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-22 23:01:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-11-22 23:01:49,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-11-22 23:01:49,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:49,233 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-11-22 23:01:49,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-22 23:01:49,234 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-11-22 23:01:49,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-22 23:01:49,234 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:49,234 INFO L402 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:49,234 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:49,234 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:49,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 4 times [2018-11-22 23:01:49,234 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:49,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:49,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-22 23:01:49,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:49,235 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:49,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,280 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:49,281 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:01:49,281 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:01:49,281 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:01:49,281 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:49,281 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/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 [2018-11-22 23:01:49,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:49,289 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-22 23:01:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:49,296 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:01:49,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,314 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:01:49,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,428 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-22 23:01:49,428 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 16 [2018-11-22 23:01:49,428 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-22 23:01:49,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-22 23:01:49,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-22 23:01:49,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-22 23:01:49,429 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-11-22 23:01:49,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:49,447 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-11-22 23:01:49,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-22 23:01:49,448 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-11-22 23:01:49,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:49,448 INFO L225 Difference]: With dead ends: 21 [2018-11-22 23:01:49,449 INFO L226 Difference]: Without dead ends: 16 [2018-11-22 23:01:49,449 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-11-22 23:01:49,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-22 23:01:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-22 23:01:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-22 23:01:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-11-22 23:01:49,452 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-11-22 23:01:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:49,452 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-11-22 23:01:49,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-22 23:01:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-11-22 23:01:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-22 23:01:49,453 INFO L394 BasicCegarLoop]: Found error trace [2018-11-22 23:01:49,453 INFO L402 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-22 23:01:49,453 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-22 23:01:49,453 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-22 23:01:49,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1860436335, now seen corresponding path program 5 times [2018-11-22 23:01:49,453 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-22 23:01:49,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:49,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-22 23:01:49,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-22 23:01:49,454 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-22 23:01:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-22 23:01:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-22 23:01:49,545 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:49,545 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-22 23:01:49,546 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-22 23:01:49,546 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-22 23:01:49,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-22 23:01:49,546 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-22 23:01:49,561 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-22 23:01:49,561 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-22 23:01:49,566 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-22 23:01:49,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-22 23:01:49,567 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-22 23:01:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-22 23:01:49,614 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-22 23:01:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-22 23:01:49,682 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-22 23:01:49,682 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [8] total 15 [2018-11-22 23:01:49,682 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-22 23:01:49,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-22 23:01:49,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-22 23:01:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2018-11-22 23:01:49,683 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 6 states. [2018-11-22 23:01:49,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-22 23:01:49,706 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-11-22 23:01:49,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-22 23:01:49,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2018-11-22 23:01:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-22 23:01:49,706 INFO L225 Difference]: With dead ends: 16 [2018-11-22 23:01:49,707 INFO L226 Difference]: Without dead ends: 0 [2018-11-22 23:01:49,707 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2018-11-22 23:01:49,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-22 23:01:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-22 23:01:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-22 23:01:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-22 23:01:49,708 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-11-22 23:01:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-22 23:01:49,708 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-22 23:01:49,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-22 23:01:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-22 23:01:49,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-22 23:01:49,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-11-22 23:01:49,737 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-11-22 23:01:49,737 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:01:49,737 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-11-22 23:01:49,737 INFO L451 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-11-22 23:01:49,737 INFO L451 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-11-22 23:01:49,737 INFO L448 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-11-22 23:01:49,737 INFO L451 ceAbstractionStarter]: At program point mainENTRY(lines 8 16) the Hoare annotation is: true [2018-11-22 23:01:49,737 INFO L448 ceAbstractionStarter]: For program point mainEXIT(lines 8 16) no Hoare annotation was computed. [2018-11-22 23:01:49,737 INFO L448 ceAbstractionStarter]: For program point mainFINAL(lines 8 16) no Hoare annotation was computed. [2018-11-22 23:01:49,737 INFO L444 ceAbstractionStarter]: At program point L11-2(lines 11 14) the Hoare annotation is: (or (and (<= main_~x~0 0) (<= 0 main_~x~0)) (< (mod (+ main_~x~0 4294967295) 4294967296) 6)) [2018-11-22 23:01:49,738 INFO L444 ceAbstractionStarter]: At program point L11-3(lines 11 14) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 6) (<= 6 (mod main_~x~0 4294967296))) [2018-11-22 23:01:49,738 INFO L448 ceAbstractionStarter]: For program point L3-2(lines 2 7) no Hoare annotation was computed. [2018-11-22 23:01:49,738 INFO L451 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 2 7) the Hoare annotation is: true [2018-11-22 23:01:49,738 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2018-11-22 23:01:49,738 INFO L448 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 2 7) no Hoare annotation was computed. [2018-11-22 23:01:49,738 INFO L448 ceAbstractionStarter]: For program point L4(line 4) no Hoare annotation was computed. [2018-11-22 23:01:49,738 INFO L448 ceAbstractionStarter]: For program point L3(lines 3 5) no Hoare annotation was computed. [2018-11-22 23:01:49,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 11:01:49 BoogieIcfgContainer [2018-11-22 23:01:49,749 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-22 23:01:49,749 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-22 23:01:49,749 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-22 23:01:49,750 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-22 23:01:49,750 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 11:01:48" (3/4) ... [2018-11-22 23:01:49,753 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-22 23:01:49,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-22 23:01:49,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-22 23:01:49,758 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-11-22 23:01:49,761 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-11-22 23:01:49,761 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-22 23:01:49,761 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-22 23:01:49,786 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_adabbe59-1d40-40df-aad8-faaa63a8bb72/bin-2019/utaipan/witness.graphml [2018-11-22 23:01:49,786 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-22 23:01:49,787 INFO L168 Benchmark]: Toolchain (without parser) took 2112.97 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 959.1 MB in the beginning and 958.3 MB in the end (delta: 870.1 kB). Peak memory consumption was 194.9 MB. Max. memory is 11.5 GB. [2018-11-22 23:01:49,788 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:01:49,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 157.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:01:49,789 INFO L168 Benchmark]: Boogie Procedure Inliner took 12.45 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:01:49,789 INFO L168 Benchmark]: Boogie Preprocessor took 12.74 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-22 23:01:49,789 INFO L168 Benchmark]: RCFGBuilder took 173.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -227.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-22 23:01:49,790 INFO L168 Benchmark]: TraceAbstraction took 1717.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 958.3 MB in the end (delta: 215.3 MB). Peak memory consumption was 215.3 MB. Max. memory is 11.5 GB. [2018-11-22 23:01:49,790 INFO L168 Benchmark]: Witness Printer took 37.27 ms. Allocated memory is still 1.2 GB. Free memory is still 958.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-22 23:01:49,792 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 157.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 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 12.45 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.74 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 173.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 194.0 MB). Free memory was 945.7 MB in the beginning and 1.2 GB in the end (delta: -227.9 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1717.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 958.3 MB in the end (delta: 215.3 MB). Peak memory consumption was 215.3 MB. Max. memory is 11.5 GB. * Witness Printer took 37.27 ms. Allocated memory is still 1.2 GB. Free memory is still 958.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: (x <= 0 && 0 <= x) || (x + 4294967295) % 4294967296 < 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 17 locations, 1 error locations. SAFE Result, 1.6s OverallTime, 6 OverallIterations, 5 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 63 SDtfs, 2 SDslu, 120 SDs, 0 SdLazy, 90 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 91 SyntacticMatches, 15 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 33 HoareAnnotationTreeSize, 12 FomulaSimplifications, 56 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 140 NumberOfCodeBlocks, 137 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 189 ConstructedInterpolants, 0 QuantifiedInterpolants, 8389 SizeOfPredicates, 3 NumberOfNonLiveVariables, 180 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 30/105 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...