./Ultimate.py --spec ../../sv-benchmarks/c/MemSafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c -s /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56b28f59847d63942ec468b0c95f39e5b8c0763a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 13:11:39,743 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 13:11:39,744 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 13:11:39,752 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 13:11:39,753 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 13:11:39,753 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 13:11:39,754 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 13:11:39,755 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 13:11:39,757 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 13:11:39,757 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 13:11:39,758 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 13:11:39,758 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 13:11:39,759 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 13:11:39,760 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 13:11:39,761 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 13:11:39,761 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 13:11:39,762 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 13:11:39,763 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 13:11:39,765 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 13:11:39,766 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 13:11:39,767 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 13:11:39,768 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 13:11:39,770 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 13:11:39,770 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 13:11:39,770 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 13:11:39,771 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 13:11:39,772 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 13:11:39,773 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 13:11:39,773 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 13:11:39,774 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 13:11:39,774 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 13:11:39,775 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 13:11:39,775 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 13:11:39,775 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 13:11:39,776 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 13:11:39,776 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 13:11:39,777 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-18 13:11:39,788 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 13:11:39,788 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 13:11:39,789 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 13:11:39,789 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 13:11:39,789 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 13:11:39,790 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 13:11:39,790 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 13:11:39,790 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 13:11:39,790 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 13:11:39,790 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 13:11:39,790 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 13:11:39,791 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 13:11:39,791 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 13:11:39,791 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 13:11:39,791 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 13:11:39,792 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 13:11:39,792 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 13:11:39,792 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 13:11:39,792 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 13:11:39,792 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 13:11:39,793 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 13:11:39,794 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 13:11:39,794 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 13:11:39,794 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 13:11:39,794 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 13:11:39,794 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 13:11:39,794 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 13:11:39,794 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 13:11:39,795 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 13:11:39,795 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 13:11:39,795 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 13:11:39,795 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_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2018-11-18 13:11:39,825 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 13:11:39,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 13:11:39,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 13:11:39,837 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 13:11:39,837 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 13:11:39,838 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-11-18 13:11:39,881 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/data/abcd9f413/7fdf67cb08ea4ce092b8f17a8d2de1f5/FLAG253a4e0c8 [2018-11-18 13:11:40,237 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 13:11:40,237 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-11-18 13:11:40,241 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/data/abcd9f413/7fdf67cb08ea4ce092b8f17a8d2de1f5/FLAG253a4e0c8 [2018-11-18 13:11:40,656 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/data/abcd9f413/7fdf67cb08ea4ce092b8f17a8d2de1f5 [2018-11-18 13:11:40,659 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 13:11:40,660 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 13:11:40,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 13:11:40,661 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 13:11:40,663 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 13:11:40,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c3328d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40, skipping insertion in model container [2018-11-18 13:11:40,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 13:11:40,687 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 13:11:40,814 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:11:40,820 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 13:11:40,832 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 13:11:40,843 INFO L195 MainTranslator]: Completed translation [2018-11-18 13:11:40,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40 WrapperNode [2018-11-18 13:11:40,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 13:11:40,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 13:11:40,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 13:11:40,844 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 13:11:40,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 13:11:40,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 13:11:40,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 13:11:40,862 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 13:11:40,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,871 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,877 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... [2018-11-18 13:11:40,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 13:11:40,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 13:11:40,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 13:11:40,922 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 13:11:40,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:40,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 13:11:40,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 13:11:40,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 13:11:40,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 13:11:40,968 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-11-18 13:11:40,968 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-11-18 13:11:40,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 13:11:40,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 13:11:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 13:11:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 13:11:40,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 13:11:40,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 13:11:41,155 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 13:11:41,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:41 BoogieIcfgContainer [2018-11-18 13:11:41,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 13:11:41,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 13:11:41,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 13:11:41,160 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 13:11:41,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 01:11:40" (1/3) ... [2018-11-18 13:11:41,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534dfce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:11:41, skipping insertion in model container [2018-11-18 13:11:41,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 01:11:40" (2/3) ... [2018-11-18 13:11:41,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@534dfce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 01:11:41, skipping insertion in model container [2018-11-18 13:11:41,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:41" (3/3) ... [2018-11-18 13:11:41,164 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_true-valid-memsafety_true-termination.c [2018-11-18 13:11:41,170 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 13:11:41,175 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-18 13:11:41,189 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-18 13:11:41,212 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 13:11:41,213 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 13:11:41,213 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 13:11:41,213 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 13:11:41,213 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 13:11:41,213 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 13:11:41,213 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 13:11:41,213 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 13:11:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-11-18 13:11:41,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 13:11:41,235 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,236 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,237 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1597032710, now seen corresponding path program 1 times [2018-11-18 13:11:41,245 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,283 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,283 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,283 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,335 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,335 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:11:41,335 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 13:11:41,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 13:11:41,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:11:41,347 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-11-18 13:11:41,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:41,357 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-11-18 13:11:41,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 13:11:41,358 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-18 13:11:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:41,365 INFO L225 Difference]: With dead ends: 43 [2018-11-18 13:11:41,366 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 13:11:41,367 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 13:11:41,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 13:11:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-18 13:11:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 13:11:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-11-18 13:11:41,393 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 11 [2018-11-18 13:11:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:41,393 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-11-18 13:11:41,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 13:11:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-11-18 13:11:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 13:11:41,393 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,394 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,394 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1820883224, now seen corresponding path program 1 times [2018-11-18 13:11:41,394 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,395 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,396 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,437 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,437 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 13:11:41,437 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:11:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:11:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:41,439 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-11-18 13:11:41,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:41,482 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-11-18 13:11:41,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:11:41,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-18 13:11:41,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:41,485 INFO L225 Difference]: With dead ends: 59 [2018-11-18 13:11:41,485 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 13:11:41,486 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:41,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 13:11:41,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2018-11-18 13:11:41,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 13:11:41,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-11-18 13:11:41,492 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 12 [2018-11-18 13:11:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:41,492 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-11-18 13:11:41,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:11:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-11-18 13:11:41,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 13:11:41,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,493 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,493 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,493 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,493 INFO L82 PathProgramCache]: Analyzing trace with hash 697121729, now seen corresponding path program 1 times [2018-11-18 13:11:41,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,528 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,528 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:11:41,528 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:11:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:11:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:41,529 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 3 states. [2018-11-18 13:11:41,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:41,560 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2018-11-18 13:11:41,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:11:41,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-11-18 13:11:41,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:41,565 INFO L225 Difference]: With dead ends: 55 [2018-11-18 13:11:41,565 INFO L226 Difference]: Without dead ends: 55 [2018-11-18 13:11:41,565 INFO L604 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 [2018-11-18 13:11:41,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-11-18 13:11:41,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 47. [2018-11-18 13:11:41,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-11-18 13:11:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2018-11-18 13:11:41,570 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 13 [2018-11-18 13:11:41,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:41,571 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2018-11-18 13:11:41,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:11:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2018-11-18 13:11:41,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:11:41,571 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,571 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,571 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,572 INFO L82 PathProgramCache]: Analyzing trace with hash 135937166, now seen corresponding path program 1 times [2018-11-18 13:11:41,572 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,573 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,573 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,709 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 13:11:41,710 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:11:41,710 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 6 states. [2018-11-18 13:11:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:41,787 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-11-18 13:11:41,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:11:41,788 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2018-11-18 13:11:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:41,789 INFO L225 Difference]: With dead ends: 49 [2018-11-18 13:11:41,789 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 13:11:41,789 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-18 13:11:41,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 13:11:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2018-11-18 13:11:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-11-18 13:11:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2018-11-18 13:11:41,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 14 [2018-11-18 13:11:41,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:41,793 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2018-11-18 13:11:41,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2018-11-18 13:11:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-11-18 13:11:41,794 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,794 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,794 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,794 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash 135937165, now seen corresponding path program 1 times [2018-11-18 13:11:41,795 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,795 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,796 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,796 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,820 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 13:11:41,820 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:11:41,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:11:41,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 13:11:41,821 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 5 states. [2018-11-18 13:11:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:41,865 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2018-11-18 13:11:41,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:11:41,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2018-11-18 13:11:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:41,866 INFO L225 Difference]: With dead ends: 45 [2018-11-18 13:11:41,867 INFO L226 Difference]: Without dead ends: 45 [2018-11-18 13:11:41,867 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:11:41,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-11-18 13:11:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 13:11:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 13:11:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2018-11-18 13:11:41,869 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 14 [2018-11-18 13:11:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:41,870 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2018-11-18 13:11:41,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:11:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2018-11-18 13:11:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 13:11:41,870 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:41,870 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:41,871 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:41,871 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:41,871 INFO L82 PathProgramCache]: Analyzing trace with hash -497753495, now seen corresponding path program 1 times [2018-11-18 13:11:41,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:41,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,872 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:41,872 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:41,872 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:41,932 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:41,932 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 13:11:41,932 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:41,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:41,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:41,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-18 13:11:41,933 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 6 states. [2018-11-18 13:11:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:42,016 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2018-11-18 13:11:42,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:11:42,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-11-18 13:11:42,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:42,018 INFO L225 Difference]: With dead ends: 66 [2018-11-18 13:11:42,018 INFO L226 Difference]: Without dead ends: 66 [2018-11-18 13:11:42,018 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:11:42,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-18 13:11:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2018-11-18 13:11:42,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 13:11:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2018-11-18 13:11:42,025 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 17 [2018-11-18 13:11:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:42,025 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2018-11-18 13:11:42,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2018-11-18 13:11:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-18 13:11:42,027 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:42,027 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:42,028 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:42,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1254753657, now seen corresponding path program 1 times [2018-11-18 13:11:42,028 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:42,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,029 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,029 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 13:11:42,122 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:42,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-11-18 13:11:42,122 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:42,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 13:11:42,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 13:11:42,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:11:42,123 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 7 states. [2018-11-18 13:11:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:42,205 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2018-11-18 13:11:42,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:11:42,206 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2018-11-18 13:11:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:42,206 INFO L225 Difference]: With dead ends: 78 [2018-11-18 13:11:42,206 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 13:11:42,207 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:11:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 13:11:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 58. [2018-11-18 13:11:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 13:11:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-11-18 13:11:42,210 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 19 [2018-11-18 13:11:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:42,211 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-11-18 13:11:42,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 13:11:42,211 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-11-18 13:11:42,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 13:11:42,211 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:42,211 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:42,211 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:42,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 539365409, now seen corresponding path program 1 times [2018-11-18 13:11:42,212 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:42,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,212 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,213 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:11:42,240 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:42,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:11:42,241 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:42,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:11:42,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:11:42,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:42,242 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 3 states. [2018-11-18 13:11:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:42,253 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2018-11-18 13:11:42,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:11:42,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-11-18 13:11:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:42,255 INFO L225 Difference]: With dead ends: 56 [2018-11-18 13:11:42,255 INFO L226 Difference]: Without dead ends: 56 [2018-11-18 13:11:42,255 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-11-18 13:11:42,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-11-18 13:11:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 13:11:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2018-11-18 13:11:42,259 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 23 [2018-11-18 13:11:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:42,259 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2018-11-18 13:11:42,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:11:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2018-11-18 13:11:42,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-18 13:11:42,260 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:42,260 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:42,260 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:42,260 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,260 INFO L82 PathProgramCache]: Analyzing trace with hash 539365410, now seen corresponding path program 1 times [2018-11-18 13:11:42,260 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:42,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,261 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,261 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,261 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:11:42,286 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 13:11:42,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 13:11:42,286 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:42,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 13:11:42,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 13:11:42,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 13:11:42,287 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 3 states. [2018-11-18 13:11:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:42,311 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-11-18 13:11:42,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 13:11:42,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2018-11-18 13:11:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:42,312 INFO L225 Difference]: With dead ends: 60 [2018-11-18 13:11:42,312 INFO L226 Difference]: Without dead ends: 60 [2018-11-18 13:11:42,313 INFO L604 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 [2018-11-18 13:11:42,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-11-18 13:11:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2018-11-18 13:11:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-11-18 13:11:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2018-11-18 13:11:42,315 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 23 [2018-11-18 13:11:42,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:42,316 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2018-11-18 13:11:42,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 13:11:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2018-11-18 13:11:42,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-11-18 13:11:42,316 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:42,316 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:42,317 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:42,317 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1636713196, now seen corresponding path program 1 times [2018-11-18 13:11:42,317 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:42,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,318 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:11:42,341 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:42,341 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:42,342 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-11-18 13:11:42,343 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [61], [76], [77], [78], [80], [81] [2018-11-18 13:11:42,364 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:11:42,364 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:11:42,635 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:11:42,636 INFO L272 AbstractInterpreter]: Visited 29 different actions 146 times. Merged at 16 different actions 74 times. Never widened. Performed 663 root evaluator evaluations with a maximum evaluation depth of 4. Performed 663 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 11 fixpoints after 5 different actions. Largest state had 21 variables. [2018-11-18 13:11:42,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,643 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:11:42,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:42,644 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:42,650 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,650 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:11:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,675 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:11:42,693 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 13:11:42,731 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:11:42,731 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2018-11-18 13:11:42,731 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:11:42,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 13:11:42,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 13:11:42,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:11:42,732 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 5 states. [2018-11-18 13:11:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:42,764 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2018-11-18 13:11:42,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-18 13:11:42,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2018-11-18 13:11:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:42,766 INFO L225 Difference]: With dead ends: 84 [2018-11-18 13:11:42,766 INFO L226 Difference]: Without dead ends: 84 [2018-11-18 13:11:42,766 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-11-18 13:11:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-18 13:11:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 67. [2018-11-18 13:11:42,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 13:11:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2018-11-18 13:11:42,770 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 31 [2018-11-18 13:11:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:42,771 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2018-11-18 13:11:42,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 13:11:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2018-11-18 13:11:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 13:11:42,773 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:42,773 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:42,773 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:42,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1366080393, now seen corresponding path program 1 times [2018-11-18 13:11:42,774 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:42,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:42,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:42,775 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:42,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:42,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:42,854 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-11-18 13:11:42,854 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [40], [42], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 13:11:42,857 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:11:42,857 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:11:43,001 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:11:43,002 INFO L272 AbstractInterpreter]: Visited 25 different actions 142 times. Merged at 17 different actions 77 times. Never widened. Performed 668 root evaluator evaluations with a maximum evaluation depth of 4. Performed 668 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 10 fixpoints after 4 different actions. Largest state had 21 variables. [2018-11-18 13:11:43,020 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:43,020 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:11:43,020 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:43,020 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:43,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:43,030 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:11:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:43,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:43,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:43,181 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:11:43,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 11 [2018-11-18 13:11:43,181 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:43,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:43,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:43,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-11-18 13:11:43,182 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 6 states. [2018-11-18 13:11:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:43,254 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2018-11-18 13:11:43,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:11:43,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2018-11-18 13:11:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:43,255 INFO L225 Difference]: With dead ends: 77 [2018-11-18 13:11:43,255 INFO L226 Difference]: Without dead ends: 74 [2018-11-18 13:11:43,256 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2018-11-18 13:11:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2018-11-18 13:11:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-11-18 13:11:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2018-11-18 13:11:43,258 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 36 [2018-11-18 13:11:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:43,258 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2018-11-18 13:11:43,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2018-11-18 13:11:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-11-18 13:11:43,258 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:43,258 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:43,259 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:43,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:43,259 INFO L82 PathProgramCache]: Analyzing trace with hash 16259142, now seen corresponding path program 1 times [2018-11-18 13:11:43,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:43,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:43,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:43,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:43,260 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 13:11:43,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:43,316 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:43,316 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 39 with the following transitions: [2018-11-18 13:11:43,316 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [12], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [40], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 13:11:43,317 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:11:43,317 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:11:43,396 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:11:43,396 INFO L272 AbstractInterpreter]: Visited 25 different actions 133 times. Merged at 17 different actions 62 times. Never widened. Performed 606 root evaluator evaluations with a maximum evaluation depth of 4. Performed 606 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 9 fixpoints after 3 different actions. Largest state had 21 variables. [2018-11-18 13:11:43,415 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:43,415 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:11:43,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:43,416 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:43,421 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:43,422 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:11:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:43,436 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 13:11:43,449 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 13:11:43,488 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:11:43,488 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2018-11-18 13:11:43,488 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:11:43,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:11:43,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:11:43,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:43,489 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand 10 states. [2018-11-18 13:11:43,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:43,580 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2018-11-18 13:11:43,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 13:11:43,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2018-11-18 13:11:43,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:43,581 INFO L225 Difference]: With dead ends: 85 [2018-11-18 13:11:43,581 INFO L226 Difference]: Without dead ends: 85 [2018-11-18 13:11:43,582 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-11-18 13:11:43,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-11-18 13:11:43,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2018-11-18 13:11:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-18 13:11:43,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-11-18 13:11:43,586 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 38 [2018-11-18 13:11:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:43,586 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-11-18 13:11:43,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:11:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-11-18 13:11:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-11-18 13:11:43,587 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:43,587 INFO L375 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:43,587 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:43,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:43,587 INFO L82 PathProgramCache]: Analyzing trace with hash 407106671, now seen corresponding path program 2 times [2018-11-18 13:11:43,588 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:43,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:43,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:43,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:43,588 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:43,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:43,663 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:43,663 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:11:43,663 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:11:43,663 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:43,664 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:43,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:11:43,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:11:43,684 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 13:11:43,684 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:11:43,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:43,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:43,772 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:43,843 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-11-18 13:11:43,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:11:43,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-11-18 13:11:43,871 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:11:43,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 13:11:43,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 13:11:43,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:43,872 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 10 states. [2018-11-18 13:11:43,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:43,989 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2018-11-18 13:11:43,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 13:11:43,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2018-11-18 13:11:43,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:43,990 INFO L225 Difference]: With dead ends: 82 [2018-11-18 13:11:43,990 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 13:11:43,991 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-11-18 13:11:43,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 13:11:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2018-11-18 13:11:43,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-18 13:11:43,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2018-11-18 13:11:43,993 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 42 [2018-11-18 13:11:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:43,994 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2018-11-18 13:11:43,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 13:11:43,994 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2018-11-18 13:11:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-11-18 13:11:43,995 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:43,995 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:43,995 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:43,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:43,999 INFO L82 PathProgramCache]: Analyzing trace with hash 528403047, now seen corresponding path program 3 times [2018-11-18 13:11:43,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:44,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:11:44,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,000 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:44,059 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-11-18 13:11:44,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:44,059 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:11:44,059 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:11:44,059 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,059 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/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 [2018-11-18 13:11:44,074 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-18 13:11:44,074 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-11-18 13:11:44,103 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-18 13:11:44,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:11:44,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:44,146 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 13:11:44,146 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,155 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 13:11:44,158 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 13:11:44,159 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 13:11:44,159 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,165 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,172 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 13:11:44,172 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-11-18 13:11:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:44,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:44,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:11:44,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 11 [2018-11-18 13:11:44,394 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:11:44,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 13:11:44,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 13:11:44,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:44,395 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand 9 states. [2018-11-18 13:11:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:44,486 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2018-11-18 13:11:44,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:11:44,486 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2018-11-18 13:11:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:44,487 INFO L225 Difference]: With dead ends: 76 [2018-11-18 13:11:44,487 INFO L226 Difference]: Without dead ends: 76 [2018-11-18 13:11:44,488 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-11-18 13:11:44,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2018-11-18 13:11:44,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2018-11-18 13:11:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 13:11:44,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2018-11-18 13:11:44,491 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 48 [2018-11-18 13:11:44,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:44,491 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2018-11-18 13:11:44,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 13:11:44,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2018-11-18 13:11:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-11-18 13:11:44,492 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:44,492 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:44,492 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:44,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:44,493 INFO L82 PathProgramCache]: Analyzing trace with hash 939452465, now seen corresponding path program 2 times [2018-11-18 13:11:44,493 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:44,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:11:44,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,494 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:44,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,527 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:44,527 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:11:44,527 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:11:44,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,528 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:11:44,549 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:11:44,549 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:11:44,559 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 13:11:44,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:11:44,562 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:44,584 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 13:11:44,586 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 13:11:44,587 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 13:11:44,587 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,602 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,609 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 13:11:44,609 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:44,613 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 13:11:44,613 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2018-11-18 13:11:44,705 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-11-18 13:11:44,705 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:44,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2018-11-18 13:11:44,812 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:11:44,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [5] total 12 [2018-11-18 13:11:44,812 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:44,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:44,813 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 6 states. [2018-11-18 13:11:44,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:44,847 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2018-11-18 13:11:44,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:11:44,848 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2018-11-18 13:11:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:44,848 INFO L225 Difference]: With dead ends: 72 [2018-11-18 13:11:44,849 INFO L226 Difference]: Without dead ends: 72 [2018-11-18 13:11:44,849 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2018-11-18 13:11:44,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2018-11-18 13:11:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2018-11-18 13:11:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-11-18 13:11:44,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2018-11-18 13:11:44,852 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 56 [2018-11-18 13:11:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:44,852 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2018-11-18 13:11:44,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2018-11-18 13:11:44,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-11-18 13:11:44,856 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:44,856 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:44,856 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:44,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:44,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1221488122, now seen corresponding path program 1 times [2018-11-18 13:11:44,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:44,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 13:11:44,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:44,857 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:44,890 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,890 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:44,890 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 60 with the following transitions: [2018-11-18 13:11:44,891 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [59], [64], [66], [75], [76], [77], [78], [80], [81] [2018-11-18 13:11:44,892 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 13:11:44,892 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 13:11:44,967 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 13:11:44,968 INFO L272 AbstractInterpreter]: Visited 32 different actions 149 times. Merged at 16 different actions 74 times. Never widened. Performed 676 root evaluator evaluations with a maximum evaluation depth of 4. Performed 676 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 11 fixpoints after 5 different actions. Largest state had 21 variables. [2018-11-18 13:11:44,970 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:44,970 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 13:11:44,971 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:44,971 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:11:44,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:44,990 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 13:11:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:45,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:45,031 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 13:11:45,088 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 13:11:45,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 13:11:45,088 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 13:11:45,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:45,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:45,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:11:45,089 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 6 states. [2018-11-18 13:11:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:45,127 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2018-11-18 13:11:45,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 13:11:45,128 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2018-11-18 13:11:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:45,128 INFO L225 Difference]: With dead ends: 98 [2018-11-18 13:11:45,129 INFO L226 Difference]: Without dead ends: 98 [2018-11-18 13:11:45,129 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 13:11:45,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-18 13:11:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2018-11-18 13:11:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 13:11:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-11-18 13:11:45,131 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 59 [2018-11-18 13:11:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:45,132 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2018-11-18 13:11:45,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2018-11-18 13:11:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-11-18 13:11:45,133 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 13:11:45,133 INFO L375 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 13:11:45,133 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr2REQUIRES_VIOLATION, fooErr1REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-11-18 13:11:45,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 13:11:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1207031361, now seen corresponding path program 2 times [2018-11-18 13:11:45,134 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 13:11:45,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:45,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 13:11:45,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 13:11:45,135 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 13:11:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 13:11:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-18 13:11:45,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:45,193 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 13:11:45,193 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 13:11:45,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 13:11:45,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 13:11:45,193 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 13:11:45,214 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 13:11:45,214 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 13:11:45,224 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 13:11:45,225 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 13:11:45,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 13:11:45,266 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 13:11:45,267 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 13:11:45,269 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 13:11:45,269 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,272 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,276 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 13:11:45,276 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 13:11:45,334 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 13:11:45,336 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 13:11:45,339 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 13:11:45,339 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,345 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,350 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 13:11:45,350 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 13:11:45,392 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 13:11:45,393 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 13:11:45,396 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 13:11:45,397 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,402 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 13:11:45,408 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 13:11:45,408 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 13:11:46,082 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-11-18 13:11:46,082 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 13:11:46,139 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2018-11-18 13:11:46,156 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 13:11:46,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 12 [2018-11-18 13:11:46,157 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 13:11:46,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 13:11:46,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 13:11:46,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=99, Unknown=1, NotChecked=0, Total=132 [2018-11-18 13:11:46,158 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 6 states. [2018-11-18 13:11:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 13:11:56,277 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2018-11-18 13:11:56,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 13:11:56,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2018-11-18 13:11:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 13:11:56,278 INFO L225 Difference]: With dead ends: 80 [2018-11-18 13:11:56,278 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 13:11:56,279 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=37, Invalid=118, Unknown=1, NotChecked=0, Total=156 [2018-11-18 13:11:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 13:11:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 13:11:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 13:11:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 13:11:56,280 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 84 [2018-11-18 13:11:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 13:11:56,280 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 13:11:56,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 13:11:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 13:11:56,280 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 13:11:56,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 01:11:56 BoogieIcfgContainer [2018-11-18 13:11:56,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 13:11:56,285 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 13:11:56,285 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 13:11:56,285 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 13:11:56,285 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 01:11:41" (3/4) ... [2018-11-18 13:11:56,288 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 13:11:56,292 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 13:11:56,292 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-11-18 13:11:56,293 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 13:11:56,296 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2018-11-18 13:11:56,296 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 13:11:56,296 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 13:11:56,296 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 13:11:56,328 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_1ddd9743-9473-437c-b6fc-f85a6e01e038/bin-2019/utaipan/witness.graphml [2018-11-18 13:11:56,329 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 13:11:56,329 INFO L168 Benchmark]: Toolchain (without parser) took 15669.94 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 164.6 MB). Free memory was 953.8 MB in the beginning and 858.6 MB in the end (delta: 95.2 MB). Peak memory consumption was 259.8 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,331 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 13:11:56,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.91 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.68 ms. Allocated memory is still 1.0 GB. Free memory was 942.8 MB in the beginning and 940.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,332 INFO L168 Benchmark]: Boogie Preprocessor took 60.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,332 INFO L168 Benchmark]: RCFGBuilder took 233.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,333 INFO L168 Benchmark]: TraceAbstraction took 15127.80 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 52.4 MB). Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 222.8 MB). Peak memory consumption was 275.2 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,333 INFO L168 Benchmark]: Witness Printer took 43.95 ms. Allocated memory is still 1.2 GB. Free memory was 863.5 MB in the beginning and 858.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. [2018-11-18 13:11:56,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 182.91 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 942.8 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.68 ms. Allocated memory is still 1.0 GB. Free memory was 942.8 MB in the beginning and 940.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 60.26 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 112.2 MB). Free memory was 940.2 MB in the beginning and 1.1 GB in the end (delta: -168.4 MB). Peak memory consumption was 14.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 233.85 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 15127.80 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 52.4 MB). Free memory was 1.1 GB in the beginning and 863.5 MB in the end (delta: 222.8 MB). Peak memory consumption was 275.2 MB. Max. memory is 11.5 GB. * Witness Printer took 43.95 ms. Allocated memory is still 1.2 GB. Free memory was 863.5 MB in the beginning and 858.6 MB in the end (delta: 4.9 MB). Peak memory consumption was 4.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 8 error locations. SAFE Result, 15.0s OverallTime, 17 OverallIterations, 8 TraceHistogramMax, 11.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 512 SDtfs, 579 SDslu, 939 SDs, 0 SdLazy, 1009 SolverSat, 81 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 10.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 877 GetRequests, 752 SyntacticMatches, 19 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 4 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 136 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 934 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 1295 ConstructedInterpolants, 159 QuantifiedInterpolants, 354773 SizeOfPredicates, 14 NumberOfNonLiveVariables, 869 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 33 InterpolantComputations, 15 PerfectInterpolantSequences, 892/1015 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...