./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/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 32d9f155778c5c4efaa55d37fdad329bb0d271b5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 18:18:02,835 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 18:18:02,836 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 18:18:02,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 18:18:02,842 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 18:18:02,843 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 18:18:02,843 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 18:18:02,844 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 18:18:02,845 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 18:18:02,845 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 18:18:02,846 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 18:18:02,846 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 18:18:02,846 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 18:18:02,847 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 18:18:02,847 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 18:18:02,848 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 18:18:02,848 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 18:18:02,849 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 18:18:02,850 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 18:18:02,851 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 18:18:02,851 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 18:18:02,852 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 18:18:02,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 18:18:02,853 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 18:18:02,853 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 18:18:02,853 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 18:18:02,854 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 18:18:02,854 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 18:18:02,854 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 18:18:02,855 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 18:18:02,855 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 18:18:02,855 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 18:18:02,855 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 18:18:02,856 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 18:18:02,856 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 18:18:02,856 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 18:18:02,856 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-12-09 18:18:02,863 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 18:18:02,864 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 18:18:02,864 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 18:18:02,864 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 18:18:02,864 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 18:18:02,864 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 18:18:02,864 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 18:18:02,865 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-09 18:18:02,865 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-09 18:18:02,865 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 18:18:02,866 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 18:18:02,866 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 18:18:02,867 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 18:18:02,867 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 18:18:02,867 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_4b322e35-3865-4de9-bf3d-3ef71201f64c/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 -> 32d9f155778c5c4efaa55d37fdad329bb0d271b5 [2018-12-09 18:18:02,885 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 18:18:02,894 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 18:18:02,897 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 18:18:02,898 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 18:18:02,898 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 18:18:02,899 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-12-09 18:18:02,939 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/data/b09bfbe27/4e6be822a06941e297cdec27e212eec0/FLAG95f041b14 [2018-12-09 18:18:03,369 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 18:18:03,369 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-12-09 18:18:03,373 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/data/b09bfbe27/4e6be822a06941e297cdec27e212eec0/FLAG95f041b14 [2018-12-09 18:18:03,381 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/data/b09bfbe27/4e6be822a06941e297cdec27e212eec0 [2018-12-09 18:18:03,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 18:18:03,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 18:18:03,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 18:18:03,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 18:18:03,387 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 18:18:03,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12334432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03, skipping insertion in model container [2018-12-09 18:18:03,389 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 18:18:03,404 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 18:18:03,489 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 18:18:03,494 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 18:18:03,504 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 18:18:03,513 INFO L195 MainTranslator]: Completed translation [2018-12-09 18:18:03,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03 WrapperNode [2018-12-09 18:18:03,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 18:18:03,513 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 18:18:03,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 18:18:03,514 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 18:18:03,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,523 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,527 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 18:18:03,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 18:18:03,528 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 18:18:03,528 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 18:18:03,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,564 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,565 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,573 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... [2018-12-09 18:18:03,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 18:18:03,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 18:18:03,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 18:18:03,575 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 18:18:03,575 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-12-09 18:18:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-12-09 18:18:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 18:18:03,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 18:18:03,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-12-09 18:18:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-12-09 18:18:03,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-12-09 18:18:03,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 18:18:03,753 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 18:18:03,753 INFO L280 CfgBuilder]: Removed 3 assue(true) statements. [2018-12-09 18:18:03,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:18:03 BoogieIcfgContainer [2018-12-09 18:18:03,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 18:18:03,754 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 18:18:03,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 18:18:03,756 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 18:18:03,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:18:03" (1/3) ... [2018-12-09 18:18:03,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d42d04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:18:03, skipping insertion in model container [2018-12-09 18:18:03,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:18:03" (2/3) ... [2018-12-09 18:18:03,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d42d04d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:18:03, skipping insertion in model container [2018-12-09 18:18:03,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:18:03" (3/3) ... [2018-12-09 18:18:03,758 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5_true-valid-memsafety.c [2018-12-09 18:18:03,764 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 18:18:03,768 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-12-09 18:18:03,780 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-12-09 18:18:03,796 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 18:18:03,796 INFO L383 AbstractCegarLoop]: Hoare is false [2018-12-09 18:18:03,796 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 18:18:03,796 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 18:18:03,796 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 18:18:03,796 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 18:18:03,796 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 18:18:03,796 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 18:18:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2018-12-09 18:18:03,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-12-09 18:18:03,811 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:03,811 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:03,813 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:03,816 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2018-12-09 18:18:03,817 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:03,846 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:03,847 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:03,847 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:03,847 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:03,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:18:03,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 18:18:03,913 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:03,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 18:18:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 18:18:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 18:18:03,925 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2018-12-09 18:18:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:03,967 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2018-12-09 18:18:03,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 18:18:03,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2018-12-09 18:18:03,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:03,973 INFO L225 Difference]: With dead ends: 58 [2018-12-09 18:18:03,973 INFO L226 Difference]: Without dead ends: 54 [2018-12-09 18:18:03,974 INFO L631 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 [2018-12-09 18:18:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-12-09 18:18:03,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2018-12-09 18:18:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-12-09 18:18:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2018-12-09 18:18:03,998 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2018-12-09 18:18:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:03,998 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2018-12-09 18:18:03,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 18:18:03,998 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2018-12-09 18:18:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-12-09 18:18:03,998 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:03,999 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:03,999 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:03,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:03,999 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2018-12-09 18:18:03,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:04,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:04,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,000 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:04,040 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:18:04,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 18:18:04,040 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:04,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 18:18:04,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 18:18:04,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-09 18:18:04,042 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 5 states. [2018-12-09 18:18:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:04,091 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2018-12-09 18:18:04,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:18:04,092 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-12-09 18:18:04,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:04,092 INFO L225 Difference]: With dead ends: 59 [2018-12-09 18:18:04,092 INFO L226 Difference]: Without dead ends: 59 [2018-12-09 18:18:04,093 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-12-09 18:18:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-12-09 18:18:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2018-12-09 18:18:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 18:18:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-12-09 18:18:04,096 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 11 [2018-12-09 18:18:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:04,096 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-12-09 18:18:04,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 18:18:04,096 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-12-09 18:18:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 18:18:04,097 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:04,097 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:04,097 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:04,097 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2018-12-09 18:18:04,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,098 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:04,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,098 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:04,132 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:18:04,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-12-09 18:18:04,132 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:04,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-12-09 18:18:04,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-12-09 18:18:04,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-12-09 18:18:04,133 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 3 states. [2018-12-09 18:18:04,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:04,149 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-12-09 18:18:04,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 18:18:04,150 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-12-09 18:18:04,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:04,151 INFO L225 Difference]: With dead ends: 43 [2018-12-09 18:18:04,152 INFO L226 Difference]: Without dead ends: 43 [2018-12-09 18:18:04,152 INFO L631 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 [2018-12-09 18:18:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-12-09 18:18:04,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-12-09 18:18:04,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-12-09 18:18:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2018-12-09 18:18:04,154 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2018-12-09 18:18:04,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:04,155 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2018-12-09 18:18:04,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-12-09 18:18:04,155 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2018-12-09 18:18:04,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-12-09 18:18:04,155 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:04,155 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:04,155 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:04,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:04,156 INFO L82 PathProgramCache]: Analyzing trace with hash 143250927, now seen corresponding path program 1 times [2018-12-09 18:18:04,156 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:04,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:04,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,157 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:04,203 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 18:18:04,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-12-09 18:18:04,203 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:04,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-12-09 18:18:04,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-12-09 18:18:04,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 18:18:04,204 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 4 states. [2018-12-09 18:18:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:04,234 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2018-12-09 18:18:04,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-12-09 18:18:04,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2018-12-09 18:18:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:04,235 INFO L225 Difference]: With dead ends: 47 [2018-12-09 18:18:04,236 INFO L226 Difference]: Without dead ends: 47 [2018-12-09 18:18:04,236 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-12-09 18:18:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-12-09 18:18:04,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-12-09 18:18:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-12-09 18:18:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-12-09 18:18:04,239 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 15 [2018-12-09 18:18:04,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:04,239 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-12-09 18:18:04,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-12-09 18:18:04,239 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-12-09 18:18:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-12-09 18:18:04,240 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:04,240 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:04,240 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:04,240 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1902162976, now seen corresponding path program 1 times [2018-12-09 18:18:04,240 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:04,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:04,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:04,241 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:04,263 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:04,263 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:04,264 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-12-09 18:18:04,265 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [22], [23], [27], [33], [35], [37], [38], [41], [43], [47], [55], [58], [73], [74], [75], [77], [78] [2018-12-09 18:18:04,285 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:04,285 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:04,384 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-12-09 18:18:04,385 INFO L272 AbstractInterpreter]: Visited 18 different actions 26 times. Merged at 2 different actions 2 times. Never widened. Performed 165 root evaluator evaluations with a maximum evaluation depth of 4. Performed 165 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-12-09 18:18:04,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:04,389 INFO L401 sIntCurrentIteration]: Generating AbsInt predicates [2018-12-09 18:18:04,432 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 70.76% of their original sizes. [2018-12-09 18:18:04,432 INFO L416 sIntCurrentIteration]: Unifying AI predicates [2018-12-09 18:18:04,511 INFO L418 sIntCurrentIteration]: We unified 20 AI predicates to 20 [2018-12-09 18:18:04,511 INFO L427 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-12-09 18:18:04,512 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:18:04,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [4] total 15 [2018-12-09 18:18:04,512 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:04,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-09 18:18:04,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-09 18:18:04,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:18:04,513 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 13 states. [2018-12-09 18:18:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:05,158 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-12-09 18:18:05,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-09 18:18:05,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-12-09 18:18:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:05,159 INFO L225 Difference]: With dead ends: 79 [2018-12-09 18:18:05,159 INFO L226 Difference]: Without dead ends: 79 [2018-12-09 18:18:05,160 INFO L631 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-12-09 18:18:05,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-09 18:18:05,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2018-12-09 18:18:05,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 18:18:05,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2018-12-09 18:18:05,165 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 21 [2018-12-09 18:18:05,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:05,166 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2018-12-09 18:18:05,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-09 18:18:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2018-12-09 18:18:05,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 18:18:05,166 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:05,166 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:05,167 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:05,167 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787427, now seen corresponding path program 1 times [2018-12-09 18:18:05,167 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:05,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,168 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,168 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,168 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,210 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:05,210 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-09 18:18:05,211 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [14], [22], [23], [27], [35], [37], [38], [41], [43], [73], [74], [75], [77], [78] [2018-12-09 18:18:05,212 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:05,212 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:05,228 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:05,228 INFO L272 AbstractInterpreter]: Visited 20 different actions 28 times. Merged at 2 different actions 2 times. Never widened. Performed 172 root evaluator evaluations with a maximum evaluation depth of 4. Performed 172 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-12-09 18:18:05,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,230 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:05,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,230 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:05,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,236 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:05,271 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 [2018-12-09 18:18:05,277 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 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 12 treesize of output 11 [2018-12-09 18:18:05,277 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:05,280 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:05,283 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-12-09 18:18:05,283 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2018-12-09 18:18:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,307 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,334 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:05,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 6 [2018-12-09 18:18:05,335 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:05,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 18:18:05,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 18:18:05,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-12-09 18:18:05,335 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand 7 states. [2018-12-09 18:18:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:05,386 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2018-12-09 18:18:05,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 18:18:05,386 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2018-12-09 18:18:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:05,387 INFO L225 Difference]: With dead ends: 64 [2018-12-09 18:18:05,387 INFO L226 Difference]: Without dead ends: 64 [2018-12-09 18:18:05,387 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:18:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-12-09 18:18:05,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-12-09 18:18:05,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-12-09 18:18:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2018-12-09 18:18:05,390 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 23 [2018-12-09 18:18:05,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:05,390 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2018-12-09 18:18:05,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 18:18:05,390 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2018-12-09 18:18:05,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-12-09 18:18:05,391 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:05,391 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:05,391 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:05,391 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1760787428, now seen corresponding path program 1 times [2018-12-09 18:18:05,391 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:05,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,392 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,392 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,453 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:05,454 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 24 with the following transitions: [2018-12-09 18:18:05,454 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [15], [22], [23], [27], [35], [37], [38], [41], [43], [73], [74], [75], [77], [78] [2018-12-09 18:18:05,455 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:05,455 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:05,469 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:05,469 INFO L272 AbstractInterpreter]: Visited 20 different actions 28 times. Merged at 2 different actions 2 times. Never widened. Performed 173 root evaluator evaluations with a maximum evaluation depth of 4. Performed 173 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-12-09 18:18:05,471 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,471 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:05,471 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,471 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:05,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,479 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:05,496 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 [2018-12-09 18:18:05,498 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:05,503 INFO L478 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 15 [2018-12-09 18:18:05,504 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-12-09 18:18:05,510 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-12-09 18:18:05,518 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2018-12-09 18:18:05,518 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:13, output treesize:24 [2018-12-09 18:18:05,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,566 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:05,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2018-12-09 18:18:05,631 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:05,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-09 18:18:05,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-09 18:18:05,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:18:05,632 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2018-12-09 18:18:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:05,699 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2018-12-09 18:18:05,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 18:18:05,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2018-12-09 18:18:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:05,700 INFO L225 Difference]: With dead ends: 68 [2018-12-09 18:18:05,700 INFO L226 Difference]: Without dead ends: 68 [2018-12-09 18:18:05,700 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-12-09 18:18:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-12-09 18:18:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2018-12-09 18:18:05,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 18:18:05,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2018-12-09 18:18:05,703 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 23 [2018-12-09 18:18:05,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:05,703 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2018-12-09 18:18:05,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-09 18:18:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2018-12-09 18:18:05,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-12-09 18:18:05,704 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:05,704 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:05,704 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:05,704 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1134972881, now seen corresponding path program 1 times [2018-12-09 18:18:05,704 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,705 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,739 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,739 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:05,739 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2018-12-09 18:18:05,739 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [22], [23], [27], [35], [37], [38], [40], [41], [43], [73], [74], [75], [77], [78] [2018-12-09 18:18:05,740 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:05,740 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:05,753 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:05,753 INFO L272 AbstractInterpreter]: Visited 18 different actions 25 times. Merged at 2 different actions 2 times. Never widened. Performed 165 root evaluator evaluations with a maximum evaluation depth of 4. Performed 165 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 20 variables. [2018-12-09 18:18:05,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,754 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:05,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,754 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:05,763 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,763 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,798 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-12-09 18:18:05,852 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:18:05,852 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 10 [2018-12-09 18:18:05,852 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:05,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 18:18:05,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 18:18:05,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-12-09 18:18:05,853 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 6 states. [2018-12-09 18:18:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:05,908 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-12-09 18:18:05,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 18:18:05,908 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2018-12-09 18:18:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:05,908 INFO L225 Difference]: With dead ends: 79 [2018-12-09 18:18:05,908 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 18:18:05,909 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:18:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 18:18:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2018-12-09 18:18:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-12-09 18:18:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2018-12-09 18:18:05,911 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 26 [2018-12-09 18:18:05,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:05,911 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2018-12-09 18:18:05,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 18:18:05,911 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2018-12-09 18:18:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-12-09 18:18:05,911 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:05,911 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:05,911 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:05,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1992931931, now seen corresponding path program 1 times [2018-12-09 18:18:05,912 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:05,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:05,912 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:05,950 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,950 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:05,950 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-12-09 18:18:05,950 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [11], [12], [13], [16], [18], [22], [23], [27], [35], [37], [38], [41], [43], [73], [74], [75], [77], [78] [2018-12-09 18:18:05,951 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:05,951 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:05,988 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:05,988 INFO L272 AbstractInterpreter]: Visited 23 different actions 92 times. Merged at 15 different actions 45 times. Widened at 1 different actions 1 times. Performed 482 root evaluator evaluations with a maximum evaluation depth of 4. Performed 482 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 7 fixpoints after 3 different actions. Largest state had 21 variables. [2018-12-09 18:18:05,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:05,990 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:05,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:05,990 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:05,997 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:05,997 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:06,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:06,037 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 18:18:06,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:06,079 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2018-12-09 18:18:06,079 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:06,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 18:18:06,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 18:18:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:18:06,080 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 11 states. [2018-12-09 18:18:06,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:06,158 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2018-12-09 18:18:06,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-09 18:18:06,158 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2018-12-09 18:18:06,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:06,159 INFO L225 Difference]: With dead ends: 79 [2018-12-09 18:18:06,159 INFO L226 Difference]: Without dead ends: 79 [2018-12-09 18:18:06,159 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-12-09 18:18:06,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-12-09 18:18:06,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2018-12-09 18:18:06,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-12-09 18:18:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2018-12-09 18:18:06,162 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 27 [2018-12-09 18:18:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:06,162 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2018-12-09 18:18:06,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 18:18:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2018-12-09 18:18:06,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-12-09 18:18:06,162 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:06,162 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:06,162 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:06,163 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash -790766996, now seen corresponding path program 1 times [2018-12-09 18:18:06,163 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:06,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,163 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:06,163 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,163 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,205 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,205 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:06,205 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2018-12-09 18:18:06,206 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [35], [37], [38], [40], [41], [43], [73], [74], [75], [77], [78] [2018-12-09 18:18:06,206 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:06,207 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:06,236 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:06,237 INFO L272 AbstractInterpreter]: Visited 23 different actions 80 times. Merged at 15 different actions 38 times. Never widened. Performed 427 root evaluator evaluations with a maximum evaluation depth of 4. Performed 427 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 6 fixpoints after 3 different actions. Largest state had 21 variables. [2018-12-09 18:18:06,238 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,238 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:06,238 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,238 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:06,244 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:06,244 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,256 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:06,271 INFO L478 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 [2018-12-09 18:18:06,274 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:06,274 INFO L478 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 [2018-12-09 18:18:06,275 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,289 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,297 INFO L478 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 [2018-12-09 18:18:06,298 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,301 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. [2018-12-09 18:18:06,302 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-12-09 18:18:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,353 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,390 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:06,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 3] total 8 [2018-12-09 18:18:06,391 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:06,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 18:18:06,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 18:18:06,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:18:06,391 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 7 states. [2018-12-09 18:18:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:06,425 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2018-12-09 18:18:06,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:18:06,425 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2018-12-09 18:18:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:06,425 INFO L225 Difference]: With dead ends: 67 [2018-12-09 18:18:06,425 INFO L226 Difference]: Without dead ends: 67 [2018-12-09 18:18:06,425 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:18:06,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-12-09 18:18:06,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2018-12-09 18:18:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-12-09 18:18:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-12-09 18:18:06,428 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 31 [2018-12-09 18:18:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:06,428 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2018-12-09 18:18:06,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 18:18:06,428 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2018-12-09 18:18:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-09 18:18:06,428 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:06,428 INFO L402 BasicCegarLoop]: trace histogram [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, 1] [2018-12-09 18:18:06,428 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:06,429 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,429 INFO L82 PathProgramCache]: Analyzing trace with hash 894123677, now seen corresponding path program 1 times [2018-12-09 18:18:06,429 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:06,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:06,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,429 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,454 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,454 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:06,454 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 38 with the following transitions: [2018-12-09 18:18:06,454 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [33], [35], [37], [38], [41], [43], [47], [55], [58], [73], [74], [75], [77], [78] [2018-12-09 18:18:06,455 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:06,455 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:06,496 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:06,496 INFO L272 AbstractInterpreter]: Visited 26 different actions 114 times. Merged at 14 different actions 54 times. Widened at 1 different actions 1 times. Performed 616 root evaluator evaluations with a maximum evaluation depth of 4. Performed 616 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 10 fixpoints after 3 different actions. Largest state had 21 variables. [2018-12-09 18:18:06,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,501 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:06,501 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,501 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/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 [2018-12-09 18:18:06,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:06,509 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:06,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,522 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,531 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-12-09 18:18:06,568 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:06,568 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-12-09 18:18:06,568 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:06,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 18:18:06,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 18:18:06,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:18:06,569 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 6 states. [2018-12-09 18:18:06,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:06,604 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2018-12-09 18:18:06,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:18:06,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2018-12-09 18:18:06,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:06,605 INFO L225 Difference]: With dead ends: 93 [2018-12-09 18:18:06,605 INFO L226 Difference]: Without dead ends: 93 [2018-12-09 18:18:06,605 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-12-09 18:18:06,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-12-09 18:18:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 72. [2018-12-09 18:18:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2018-12-09 18:18:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2018-12-09 18:18:06,608 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 37 [2018-12-09 18:18:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:06,608 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2018-12-09 18:18:06,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 18:18:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2018-12-09 18:18:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-12-09 18:18:06,609 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:06,609 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:06,609 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:06,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,609 INFO L82 PathProgramCache]: Analyzing trace with hash -174164318, now seen corresponding path program 2 times [2018-12-09 18:18:06,609 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:06,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,610 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:06,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,610 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-12-09 18:18:06,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,664 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:06,664 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:18:06,664 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:18:06,664 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,664 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/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 [2018-12-09 18:18:06,670 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:18:06,670 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:18:06,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 18:18:06,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:18:06,687 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-09 18:18:06,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2018-12-09 18:18:06,739 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:06,739 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2018-12-09 18:18:06,739 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:06,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-09 18:18:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-09 18:18:06,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-12-09 18:18:06,740 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 10 states. [2018-12-09 18:18:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:06,841 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2018-12-09 18:18:06,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-09 18:18:06,842 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2018-12-09 18:18:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:06,842 INFO L225 Difference]: With dead ends: 88 [2018-12-09 18:18:06,843 INFO L226 Difference]: Without dead ends: 88 [2018-12-09 18:18:06,843 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-12-09 18:18:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-12-09 18:18:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2018-12-09 18:18:06,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2018-12-09 18:18:06,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2018-12-09 18:18:06,846 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 43 [2018-12-09 18:18:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:06,847 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2018-12-09 18:18:06,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-09 18:18:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2018-12-09 18:18:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-12-09 18:18:06,848 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:06,848 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:06,848 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:06,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:06,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2073773289, now seen corresponding path program 2 times [2018-12-09 18:18:06,849 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:18:06,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:06,850 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-12-09 18:18:06,921 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,921 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:06,922 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:18:06,922 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:18:06,922 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:06,922 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/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 [2018-12-09 18:18:06,929 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:18:06,930 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:18:06,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-12-09 18:18:06,942 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:18:06,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:06,951 INFO L478 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 [2018-12-09 18:18:06,953 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:06,954 INFO L478 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 [2018-12-09 18:18:06,954 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,958 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,968 INFO L478 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 [2018-12-09 18:18:06,968 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:06,971 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. [2018-12-09 18:18:06,971 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2018-12-09 18:18:07,124 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-09 18:18:07,124 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-12-09 18:18:07,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:07,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2018-12-09 18:18:07,262 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:07,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-12-09 18:18:07,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-12-09 18:18:07,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2018-12-09 18:18:07,263 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand 16 states. [2018-12-09 18:18:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:07,535 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-12-09 18:18:07,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-09 18:18:07,535 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2018-12-09 18:18:07,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:07,535 INFO L225 Difference]: With dead ends: 83 [2018-12-09 18:18:07,536 INFO L226 Difference]: Without dead ends: 80 [2018-12-09 18:18:07,536 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2018-12-09 18:18:07,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2018-12-09 18:18:07,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2018-12-09 18:18:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-12-09 18:18:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2018-12-09 18:18:07,538 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 47 [2018-12-09 18:18:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:07,538 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2018-12-09 18:18:07,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-12-09 18:18:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2018-12-09 18:18:07,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-12-09 18:18:07,538 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:07,538 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:07,539 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:07,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash -121460091, now seen corresponding path program 2 times [2018-12-09 18:18:07,539 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:07,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,539 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:18:07,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,539 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:07,566 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-12-09 18:18:07,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:07,566 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:07,566 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:18:07,566 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:18:07,566 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:07,566 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:07,574 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:18:07,574 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:18:07,580 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 18:18:07,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:18:07,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:07,588 INFO L478 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 [2018-12-09 18:18:07,589 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:07,589 INFO L478 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 [2018-12-09 18:18:07,590 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:07,593 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:07,598 INFO L478 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 [2018-12-09 18:18:07,599 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:07,601 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. [2018-12-09 18:18:07,602 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2018-12-09 18:18:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 18:18:07,696 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-12-09 18:18:07,776 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:18:07,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 13 [2018-12-09 18:18:07,776 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:07,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 18:18:07,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 18:18:07,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:18:07,777 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 6 states. [2018-12-09 18:18:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:07,799 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2018-12-09 18:18:07,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-09 18:18:07,800 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2018-12-09 18:18:07,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:07,800 INFO L225 Difference]: With dead ends: 73 [2018-12-09 18:18:07,800 INFO L226 Difference]: Without dead ends: 73 [2018-12-09 18:18:07,801 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-12-09 18:18:07,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-12-09 18:18:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-12-09 18:18:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-12-09 18:18:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2018-12-09 18:18:07,803 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 58 [2018-12-09 18:18:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:07,804 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2018-12-09 18:18:07,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 18:18:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2018-12-09 18:18:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-09 18:18:07,804 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:07,804 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:07,804 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:07,805 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:07,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2055106685, now seen corresponding path program 1 times [2018-12-09 18:18:07,805 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:07,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 18:18:07,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,805 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-12-09 18:18:07,838 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:07,838 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:07,838 INFO L203 CegarAbsIntRunner]: Running AI on error trace of length 62 with the following transitions: [2018-12-09 18:18:07,838 INFO L205 CegarAbsIntRunner]: [0], [1], [2], [8], [10], [12], [13], [16], [18], [22], [23], [27], [33], [35], [37], [38], [41], [43], [47], [55], [56], [61], [63], [72], [73], [74], [75], [77], [78] [2018-12-09 18:18:07,839 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-12-09 18:18:07,839 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-12-09 18:18:07,871 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-12-09 18:18:07,872 INFO L272 AbstractInterpreter]: Visited 29 different actions 95 times. Merged at 14 different actions 44 times. Widened at 1 different actions 1 times. Performed 484 root evaluator evaluations with a maximum evaluation depth of 4. Performed 484 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 7 fixpoints after 3 different actions. Largest state had 22 variables. [2018-12-09 18:18:07,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:07,873 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-12-09 18:18:07,873 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:07,873 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:07,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:07,880 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-12-09 18:18:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:07,895 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-12-09 18:18:07,908 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-12-09 18:18:07,946 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-12-09 18:18:07,946 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2018-12-09 18:18:07,946 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-12-09 18:18:07,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-12-09 18:18:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-12-09 18:18:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:18:07,947 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 7 states. [2018-12-09 18:18:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:07,982 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2018-12-09 18:18:07,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 18:18:07,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2018-12-09 18:18:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:07,983 INFO L225 Difference]: With dead ends: 103 [2018-12-09 18:18:07,983 INFO L226 Difference]: Without dead ends: 103 [2018-12-09 18:18:07,983 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2018-12-09 18:18:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-12-09 18:18:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2018-12-09 18:18:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-12-09 18:18:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2018-12-09 18:18:07,985 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 61 [2018-12-09 18:18:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:07,985 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2018-12-09 18:18:07,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-12-09 18:18:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2018-12-09 18:18:07,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-12-09 18:18:07,986 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 18:18:07,986 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 18:18:07,986 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fooErr2REQUIRES_VIOLATION, fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION]=== [2018-12-09 18:18:07,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 18:18:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash 267240299, now seen corresponding path program 2 times [2018-12-09 18:18:07,987 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 18:18:07,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,987 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 18:18:07,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 18:18:07,987 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 18:18:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 18:18:08,023 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2018-12-09 18:18:08,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:08,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 18:18:08,024 INFO L187 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-12-09 18:18:08,024 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-12-09 18:18:08,024 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 18:18:08,024 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-09 18:18:08,030 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 18:18:08,030 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-12-09 18:18:08,038 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-12-09 18:18:08,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 18:18:08,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 18:18:08,057 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:08,057 INFO L478 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 [2018-12-09 18:18:08,059 INFO L478 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 [2018-12-09 18:18:08,059 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,065 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,073 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. [2018-12-09 18:18:08,073 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 18:18:08,100 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:08,100 INFO L478 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 [2018-12-09 18:18:08,102 INFO L478 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 [2018-12-09 18:18:08,102 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,105 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,108 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. [2018-12-09 18:18:08,108 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 18:18:08,131 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:08,131 INFO L478 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 [2018-12-09 18:18:08,133 INFO L478 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 [2018-12-09 18:18:08,134 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,137 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,140 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. [2018-12-09 18:18:08,141 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 18:18:08,164 INFO L701 Elim1Store]: detected not equals via solver [2018-12-09 18:18:08,165 INFO L478 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 [2018-12-09 18:18:08,166 INFO L478 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 [2018-12-09 18:18:08,166 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,169 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-12-09 18:18:08,172 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. [2018-12-09 18:18:08,172 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-12-09 18:18:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-12-09 18:18:08,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 18:18:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2018-12-09 18:18:08,858 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-12-09 18:18:08,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [7] total 13 [2018-12-09 18:18:08,859 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 18:18:08,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 18:18:08,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 18:18:08,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2018-12-09 18:18:08,859 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 6 states. [2018-12-09 18:18:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 18:18:17,952 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2018-12-09 18:18:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 18:18:17,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2018-12-09 18:18:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 18:18:17,953 INFO L225 Difference]: With dead ends: 82 [2018-12-09 18:18:17,953 INFO L226 Difference]: Without dead ends: 0 [2018-12-09 18:18:17,953 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 152 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2018-12-09 18:18:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-09 18:18:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-09 18:18:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-09 18:18:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-09 18:18:17,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2018-12-09 18:18:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 18:18:17,953 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-09 18:18:17,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 18:18:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-09 18:18:17,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-09 18:18:17,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:18:17 BoogieIcfgContainer [2018-12-09 18:18:17,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 18:18:17,957 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 18:18:17,957 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 18:18:17,957 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 18:18:17,957 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:18:03" (3/4) ... [2018-12-09 18:18:17,960 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-09 18:18:17,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-12-09 18:18:17,963 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-12-09 18:18:17,964 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-12-09 18:18:17,967 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2018-12-09 18:18:17,967 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-12-09 18:18:17,967 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-09 18:18:17,968 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-09 18:18:17,994 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4b322e35-3865-4de9-bf3d-3ef71201f64c/bin-2019/utaipan/witness.graphml [2018-12-09 18:18:17,994 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 18:18:17,995 INFO L168 Benchmark]: Toolchain (without parser) took 14612.22 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 309.9 MB). Free memory was 957.7 MB in the beginning and 865.5 MB in the end (delta: 92.2 MB). Peak memory consumption was 402.1 MB. Max. memory is 11.5 GB. [2018-12-09 18:18:17,996 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 18:18:17,996 INFO L168 Benchmark]: CACSL2BoogieTranslator took 129.44 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-09 18:18:17,997 INFO L168 Benchmark]: Boogie Procedure Inliner took 14.03 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 18:18:17,997 INFO L168 Benchmark]: Boogie Preprocessor took 46.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -174.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-09 18:18:17,997 INFO L168 Benchmark]: RCFGBuilder took 178.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2018-12-09 18:18:17,997 INFO L168 Benchmark]: TraceAbstraction took 14203.19 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.3 MB). Free memory was 1.1 GB in the beginning and 865.5 MB in the end (delta: 237.9 MB). Peak memory consumption was 417.2 MB. Max. memory is 11.5 GB. [2018-12-09 18:18:17,998 INFO L168 Benchmark]: Witness Printer took 37.53 ms. Allocated memory is still 1.3 GB. Free memory is still 865.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 18:18:17,999 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 129.44 ms. Allocated memory is still 1.0 GB. Free memory was 957.7 MB in the beginning and 947.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 14.03 ms. Allocated memory is still 1.0 GB. Free memory is still 947.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 46.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -174.9 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 178.55 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 14203.19 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.3 MB). Free memory was 1.1 GB in the beginning and 865.5 MB in the end (delta: 237.9 MB). Peak memory consumption was 417.2 MB. Max. memory is 11.5 GB. * Witness Printer took 37.53 ms. Allocated memory is still 1.3 GB. Free memory is still 865.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: 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: 21]: 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 - 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, 40 locations, 8 error locations. SAFE Result, 14.1s OverallTime, 16 OverallIterations, 5 TraceHistogramMax, 10.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 409 SDtfs, 762 SDslu, 920 SDs, 0 SdLazy, 1220 SolverSat, 147 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 9.8s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1047 GetRequests, 853 SyntacticMatches, 40 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.3s AbstIntTime, 8 AbstIntIterations, 1 AbstIntStrong, 0.824134199134199 AbsIntWeakeningRatio, 1.25 AbsIntAvgWeakeningVarsNumRemoved, 3.55 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 16 MinimizatonAttempts, 156 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 988 NumberOfCodeBlocks, 839 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 1408 ConstructedInterpolants, 208 QuantifiedInterpolants, 389570 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1217 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 946/1147 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...