./Ultimate.py --spec ../../sv-benchmarks/c/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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/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_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/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 0.1.23-5842f4b [2018-11-18 12:56:33,617 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 12:56:33,618 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 12:56:33,625 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 12:56:33,625 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 12:56:33,626 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 12:56:33,627 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 12:56:33,628 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 12:56:33,629 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 12:56:33,630 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 12:56:33,631 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 12:56:33,631 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 12:56:33,632 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 12:56:33,632 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 12:56:33,633 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 12:56:33,634 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 12:56:33,634 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 12:56:33,636 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 12:56:33,637 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 12:56:33,638 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 12:56:33,639 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 12:56:33,640 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 12:56:33,642 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 12:56:33,642 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 12:56:33,642 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 12:56:33,643 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 12:56:33,644 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 12:56:33,644 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 12:56:33,645 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 12:56:33,646 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 12:56:33,646 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 12:56:33,646 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 12:56:33,646 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 12:56:33,646 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 12:56:33,647 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 12:56:33,647 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 12:56:33,647 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2018-11-18 12:56:33,657 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 12:56:33,657 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 12:56:33,658 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-18 12:56:33,658 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-18 12:56:33,658 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-18 12:56:33,658 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-18 12:56:33,658 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-18 12:56:33,658 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-18 12:56:33,659 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-18 12:56:33,659 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-18 12:56:33,659 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-18 12:56:33,659 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-18 12:56:33,659 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-18 12:56:33,660 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 12:56:33,660 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 12:56:33,660 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 12:56:33,660 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-18 12:56:33,660 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 12:56:33,660 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-18 12:56:33,661 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 12:56:33,662 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 12:56:33,662 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 12:56:33,662 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-18 12:56:33,662 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-18 12:56:33,662 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:56:33,662 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 12:56:33,662 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-18 12:56:33,663 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-18 12:56:33,663 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-18 12:56:33,663 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-18 12:56:33,663 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_adc0b636-eda6-456d-b911-c3417bafa997/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 [2018-11-18 12:56:33,687 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 12:56:33,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 12:56:33,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 12:56:33,700 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 12:56:33,700 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 12:56:33,701 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-11-18 12:56:33,740 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/data/e31db7a5f/2af62d5923b9452c8278091361daffd8/FLAGfcd59ff38 [2018-11-18 12:56:34,079 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 12:56:34,080 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength5_true-valid-memsafety.c [2018-11-18 12:56:34,084 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/data/e31db7a5f/2af62d5923b9452c8278091361daffd8/FLAGfcd59ff38 [2018-11-18 12:56:34,504 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/data/e31db7a5f/2af62d5923b9452c8278091361daffd8 [2018-11-18 12:56:34,507 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 12:56:34,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 12:56:34,509 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 12:56:34,509 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 12:56:34,511 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 12:56:34,512 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,513 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52aa85df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34, skipping insertion in model container [2018-11-18 12:56:34,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 12:56:34,534 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 12:56:34,666 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:56:34,673 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 12:56:34,684 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 12:56:34,694 INFO L195 MainTranslator]: Completed translation [2018-11-18 12:56:34,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34 WrapperNode [2018-11-18 12:56:34,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 12:56:34,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 12:56:34,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 12:56:34,695 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 12:56:34,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,707 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,712 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 12:56:34,712 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 12:56:34,712 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 12:56:34,712 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 12:56:34,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,720 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... [2018-11-18 12:56:34,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 12:56:34,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 12:56:34,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 12:56:34,734 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 12:56:34,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-18 12:56:34,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-18 12:56:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-18 12:56:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-18 12:56:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-18 12:56:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2018-11-18 12:56:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2018-11-18 12:56:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 12:56:34,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 12:56:34,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2018-11-18 12:56:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-18 12:56:34,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-18 12:56:34,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-18 12:56:35,021 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 12:56:35,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:56:35 BoogieIcfgContainer [2018-11-18 12:56:35,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 12:56:35,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-18 12:56:35,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-18 12:56:35,026 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-18 12:56:35,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 12:56:34" (1/3) ... [2018-11-18 12:56:35,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8638b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:56:35, skipping insertion in model container [2018-11-18 12:56:35,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 12:56:34" (2/3) ... [2018-11-18 12:56:35,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64b8638b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 12:56:35, skipping insertion in model container [2018-11-18 12:56:35,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:56:35" (3/3) ... [2018-11-18 12:56:35,029 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength5_true-valid-memsafety.c [2018-11-18 12:56:35,038 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-18 12:56:35,045 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2018-11-18 12:56:35,059 INFO L257 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2018-11-18 12:56:35,083 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-18 12:56:35,083 INFO L383 AbstractCegarLoop]: Hoare is false [2018-11-18 12:56:35,083 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-18 12:56:35,083 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 12:56:35,083 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 12:56:35,083 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-18 12:56:35,084 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 12:56:35,084 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-18 12:56:35,097 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2018-11-18 12:56:35,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-18 12:56:35,104 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,105 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,107 INFO L423 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1597032710, now seen corresponding path program 1 times [2018-11-18 12:56:35,115 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,158 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,158 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,159 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,159 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,212 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:56:35,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:56:35,213 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:35,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-18 12:56:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-18 12:56:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:56:35,228 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 2 states. [2018-11-18 12:56:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:35,244 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2018-11-18 12:56:35,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-18 12:56:35,245 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2018-11-18 12:56:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:35,251 INFO L225 Difference]: With dead ends: 43 [2018-11-18 12:56:35,251 INFO L226 Difference]: Without dead ends: 40 [2018-11-18 12:56:35,252 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-18 12:56:35,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-11-18 12:56:35,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-11-18 12:56:35,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-11-18 12:56:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2018-11-18 12:56:35,278 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 11 [2018-11-18 12:56:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:35,278 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2018-11-18 12:56:35,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-18 12:56:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2018-11-18 12:56:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-11-18 12:56:35,279 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,279 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,280 INFO L423 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1820883224, now seen corresponding path program 1 times [2018-11-18 12:56:35,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,286 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,338 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:56:35,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 12:56:35,338 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:35,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:56:35,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:56:35,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:56:35,340 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 3 states. [2018-11-18 12:56:35,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:35,397 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-11-18 12:56:35,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:56:35,398 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2018-11-18 12:56:35,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:35,399 INFO L225 Difference]: With dead ends: 59 [2018-11-18 12:56:35,399 INFO L226 Difference]: Without dead ends: 59 [2018-11-18 12:56:35,400 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:56:35,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-11-18 12:56:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 44. [2018-11-18 12:56:35,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-11-18 12:56:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2018-11-18 12:56:35,407 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 12 [2018-11-18 12:56:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:35,407 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2018-11-18 12:56:35,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:56:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2018-11-18 12:56:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-18 12:56:35,408 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,408 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,408 INFO L423 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,408 INFO L82 PathProgramCache]: Analyzing trace with hash 697121729, now seen corresponding path program 1 times [2018-11-18 12:56:35,408 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,409 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,410 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,479 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:56:35,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-18 12:56:35,479 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:35,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-18 12:56:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 12:56:35,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 12:56:35,480 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2018-11-18 12:56:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:35,589 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2018-11-18 12:56:35,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:56:35,590 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-18 12:56:35,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:35,590 INFO L225 Difference]: With dead ends: 65 [2018-11-18 12:56:35,590 INFO L226 Difference]: Without dead ends: 65 [2018-11-18 12:56:35,590 INFO L604 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 [2018-11-18 12:56:35,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-18 12:56:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2018-11-18 12:56:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 12:56:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2018-11-18 12:56:35,595 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 13 [2018-11-18 12:56:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:35,595 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2018-11-18 12:56:35,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-18 12:56:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2018-11-18 12:56:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 12:56:35,596 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,596 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,596 INFO L423 AbstractCegarLoop]: === Iteration 4 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,596 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash -497753495, now seen corresponding path program 1 times [2018-11-18 12:56:35,596 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,597 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,597 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:56:35,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-18 12:56:35,651 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:35,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-18 12:56:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-18 12:56:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:56:35,652 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 3 states. [2018-11-18 12:56:35,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:35,673 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-11-18 12:56:35,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:56:35,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2018-11-18 12:56:35,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:35,675 INFO L225 Difference]: With dead ends: 49 [2018-11-18 12:56:35,676 INFO L226 Difference]: Without dead ends: 49 [2018-11-18 12:56:35,676 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-18 12:56:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-11-18 12:56:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-11-18 12:56:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-11-18 12:56:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2018-11-18 12:56:35,680 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 17 [2018-11-18 12:56:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:35,681 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2018-11-18 12:56:35,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-18 12:56:35,681 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2018-11-18 12:56:35,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-11-18 12:56:35,681 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,681 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,681 INFO L423 AbstractCegarLoop]: === Iteration 5 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,682 INFO L82 PathProgramCache]: Analyzing trace with hash -497753494, now seen corresponding path program 1 times [2018-11-18 12:56:35,682 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,683 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 12:56:35,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-18 12:56:35,727 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:35,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-18 12:56:35,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-18 12:56:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-11-18 12:56:35,728 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 4 states. [2018-11-18 12:56:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:35,772 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2018-11-18 12:56:35,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-18 12:56:35,773 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2018-11-18 12:56:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:35,773 INFO L225 Difference]: With dead ends: 53 [2018-11-18 12:56:35,774 INFO L226 Difference]: Without dead ends: 53 [2018-11-18 12:56:35,774 INFO L604 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 [2018-11-18 12:56:35,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-11-18 12:56:35,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-11-18 12:56:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-18 12:56:35,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2018-11-18 12:56:35,778 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 17 [2018-11-18 12:56:35,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:35,778 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2018-11-18 12:56:35,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-18 12:56:35,779 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2018-11-18 12:56:35,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-18 12:56:35,779 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:35,779 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:35,780 INFO L423 AbstractCegarLoop]: === Iteration 6 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:35,780 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,780 INFO L82 PathProgramCache]: Analyzing trace with hash -334869196, now seen corresponding path program 1 times [2018-11-18 12:56:35,780 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:35,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:35,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:35,781 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:35,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:35,820 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:35,821 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 26 with the following transitions: [2018-11-18 12:56:35,822 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [61], [76], [77], [78], [80], [81] [2018-11-18 12:56:35,843 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:35,843 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:35,978 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-11-18 12:56:35,979 INFO L272 AbstractInterpreter]: Visited 20 different actions 30 times. Merged at 3 different actions 3 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. [2018-11-18 12:56:35,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:35,985 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-11-18 12:56:36,053 INFO L227 lantSequenceWeakener]: Weakened 6 states. On average, predicates are now at 71.09% of their original sizes. [2018-11-18 12:56:36,053 INFO L413 sIntCurrentIteration]: Unifying AI predicates [2018-11-18 12:56:36,185 INFO L415 sIntCurrentIteration]: We unified 24 AI predicates to 24 [2018-11-18 12:56:36,185 INFO L424 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-11-18 12:56:36,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:56:36,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [4] total 15 [2018-11-18 12:56:36,185 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:36,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-18 12:56:36,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-18 12:56:36,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:56:36,186 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 13 states. [2018-11-18 12:56:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:36,979 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2018-11-18 12:56:36,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:56:36,979 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2018-11-18 12:56:36,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:36,982 INFO L225 Difference]: With dead ends: 88 [2018-11-18 12:56:36,982 INFO L226 Difference]: Without dead ends: 88 [2018-11-18 12:56:36,982 INFO L604 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:56:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-11-18 12:56:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2018-11-18 12:56:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 12:56:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2018-11-18 12:56:36,992 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2018-11-18 12:56:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:36,992 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2018-11-18 12:56:36,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-18 12:56:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2018-11-18 12:56:36,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 12:56:36,994 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:36,995 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:36,995 INFO L423 AbstractCegarLoop]: === Iteration 7 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:36,995 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1367902743, now seen corresponding path program 1 times [2018-11-18 12:56:36,995 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:36,996 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:36,996 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:36,997 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:36,997 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:37,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,119 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:37,119 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 12:56:37,119 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [16], [23], [24], [28], [32], [37], [39], [40], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 12:56:37,121 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:37,121 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:37,144 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:37,145 INFO L272 AbstractInterpreter]: Visited 22 different actions 32 times. Merged at 3 different actions 3 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. [2018-11-18 12:56:37,149 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:37,150 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:37,150 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,150 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:37,157 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:37,157 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:37,204 INFO L477 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 [2018-11-18 12:56:37,217 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:37,228 INFO L477 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 [2018-11-18 12:56:37,229 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2018-11-18 12:56:37,236 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2018-11-18 12:56:37,245 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. [2018-11-18 12:56:37,246 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:13, output treesize:24 [2018-11-18 12:56:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,301 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,414 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:37,414 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2018-11-18 12:56:37,414 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:37,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-18 12:56:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-18 12:56:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:56:37,415 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 9 states. [2018-11-18 12:56:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:37,564 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2018-11-18 12:56:37,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:56:37,565 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2018-11-18 12:56:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:37,565 INFO L225 Difference]: With dead ends: 79 [2018-11-18 12:56:37,565 INFO L226 Difference]: Without dead ends: 79 [2018-11-18 12:56:37,566 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-11-18 12:56:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2018-11-18 12:56:37,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2018-11-18 12:56:37,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-18 12:56:37,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2018-11-18 12:56:37,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 27 [2018-11-18 12:56:37,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:37,574 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2018-11-18 12:56:37,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-18 12:56:37,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2018-11-18 12:56:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-18 12:56:37,574 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:37,574 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:37,575 INFO L423 AbstractCegarLoop]: === Iteration 8 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:37,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:37,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1367902744, now seen corresponding path program 1 times [2018-11-18 12:56:37,575 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:37,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:37,576 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:37,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:37,576 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,617 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:37,617 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 28 with the following transitions: [2018-11-18 12:56:37,617 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [15], [23], [24], [28], [32], [37], [39], [40], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 12:56:37,618 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:37,618 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:37,635 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:37,636 INFO L272 AbstractInterpreter]: Visited 22 different actions 32 times. Merged at 3 different actions 3 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. [2018-11-18 12:56:37,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:37,641 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:37,641 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,641 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:37,647 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:37,648 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:37,663 INFO L477 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 [2018-11-18 12:56:37,665 INFO L477 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 [2018-11-18 12:56:37,666 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:37,668 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:37,671 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. [2018-11-18 12:56:37,671 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2018-11-18 12:56:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,703 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:37,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 12:56:37,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:37,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 6 [2018-11-18 12:56:37,738 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:37,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:56:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:56:37,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-11-18 12:56:37,738 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 7 states. [2018-11-18 12:56:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:37,774 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-11-18 12:56:37,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:56:37,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-11-18 12:56:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:37,775 INFO L225 Difference]: With dead ends: 75 [2018-11-18 12:56:37,775 INFO L226 Difference]: Without dead ends: 75 [2018-11-18 12:56:37,775 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:56:37,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2018-11-18 12:56:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2018-11-18 12:56:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-11-18 12:56:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2018-11-18 12:56:37,779 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 27 [2018-11-18 12:56:37,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:37,780 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2018-11-18 12:56:37,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:56:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2018-11-18 12:56:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-11-18 12:56:37,780 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:37,780 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:37,781 INFO L423 AbstractCegarLoop]: === Iteration 9 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:37,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:37,781 INFO L82 PathProgramCache]: Analyzing trace with hash -588617937, now seen corresponding path program 1 times [2018-11-18 12:56:37,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:37,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:37,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:37,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:37,782 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:56:37,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,833 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:37,833 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 31 with the following transitions: [2018-11-18 12:56:37,833 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [23], [24], [28], [32], [37], [39], [40], [42], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 12:56:37,834 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:37,834 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:37,851 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:37,851 INFO L272 AbstractInterpreter]: Visited 20 different actions 29 times. Merged at 3 different actions 3 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. [2018-11-18 12:56:37,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:37,853 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:37,854 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:37,854 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:37,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:37,868 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:37,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:37,930 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:56:37,930 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 12:56:38,023 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:56:38,024 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 10 [2018-11-18 12:56:38,024 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:56:38,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:56:38,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:56:38,024 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 6 states. [2018-11-18 12:56:38,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:38,086 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2018-11-18 12:56:38,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:56:38,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2018-11-18 12:56:38,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:38,087 INFO L225 Difference]: With dead ends: 89 [2018-11-18 12:56:38,088 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 12:56:38,088 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:56:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 12:56:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-11-18 12:56:38,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 12:56:38,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2018-11-18 12:56:38,091 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 30 [2018-11-18 12:56:38,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:38,092 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2018-11-18 12:56:38,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:56:38,092 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2018-11-18 12:56:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-11-18 12:56:38,092 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:38,092 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:38,093 INFO L423 AbstractCegarLoop]: === Iteration 10 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:38,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:38,093 INFO L82 PathProgramCache]: Analyzing trace with hash -166630146, now seen corresponding path program 1 times [2018-11-18 12:56:38,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:38,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:38,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:38,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:38,094 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:38,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:38,137 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:38,137 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 33 with the following transitions: [2018-11-18 12:56:38,137 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [12], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [40], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 12:56:38,138 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:38,138 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:38,246 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:38,246 INFO L272 AbstractInterpreter]: Visited 25 different actions 158 times. Merged at 17 different actions 79 times. Never widened. Performed 814 root evaluator evaluations with a maximum evaluation depth of 4. Performed 814 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 11 fixpoints after 2 different actions. Largest state had 21 variables. [2018-11-18 12:56:38,261 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:38,261 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:38,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:38,261 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:38,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:38,272 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:38,288 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:38,331 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:38,331 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 12:56:38,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:38,381 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2018-11-18 12:56:38,381 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:38,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-18 12:56:38,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-18 12:56:38,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-18 12:56:38,382 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand 11 states. [2018-11-18 12:56:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:38,478 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2018-11-18 12:56:38,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 12:56:38,478 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2018-11-18 12:56:38,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:38,478 INFO L225 Difference]: With dead ends: 90 [2018-11-18 12:56:38,479 INFO L226 Difference]: Without dead ends: 90 [2018-11-18 12:56:38,479 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:56:38,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2018-11-18 12:56:38,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2018-11-18 12:56:38,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-11-18 12:56:38,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 79 transitions. [2018-11-18 12:56:38,483 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 79 transitions. Word has length 32 [2018-11-18 12:56:38,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:38,483 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 79 transitions. [2018-11-18 12:56:38,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-18 12:56:38,483 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 79 transitions. [2018-11-18 12:56:38,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-11-18 12:56:38,484 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:38,484 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:38,484 INFO L423 AbstractCegarLoop]: === Iteration 11 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:38,484 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -2102121177, now seen corresponding path program 1 times [2018-11-18 12:56:38,485 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:38,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:38,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:38,485 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:38,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:38,548 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:38,548 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 37 with the following transitions: [2018-11-18 12:56:38,548 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [37], [39], [40], [42], [43], [45], [76], [77], [78], [80], [81] [2018-11-18 12:56:38,549 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:38,550 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:38,635 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:38,635 INFO L272 AbstractInterpreter]: Visited 25 different actions 152 times. Merged at 17 different actions 81 times. Never widened. Performed 794 root evaluator evaluations with a maximum evaluation depth of 4. Performed 794 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 11 fixpoints after 2 different actions. Largest state had 21 variables. [2018-11-18 12:56:38,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:38,661 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:38,661 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:38,661 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:38,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:38,672 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:38,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:38,716 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 12:56:38,718 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:38,718 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 12:56:38,718 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:38,730 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:38,736 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 12:56:38,736 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:38,741 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:38,741 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2018-11-18 12:56:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:38,840 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:38,893 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:38,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2018-11-18 12:56:38,894 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:38,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-18 12:56:38,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 12:56:38,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-11-18 12:56:38,894 INFO L87 Difference]: Start difference. First operand 74 states and 79 transitions. Second operand 8 states. [2018-11-18 12:56:39,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:39,003 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2018-11-18 12:56:39,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:56:39,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2018-11-18 12:56:39,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:39,004 INFO L225 Difference]: With dead ends: 78 [2018-11-18 12:56:39,004 INFO L226 Difference]: Without dead ends: 78 [2018-11-18 12:56:39,005 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:56:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-11-18 12:56:39,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2018-11-18 12:56:39,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2018-11-18 12:56:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2018-11-18 12:56:39,007 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 36 [2018-11-18 12:56:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:39,007 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2018-11-18 12:56:39,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-18 12:56:39,008 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2018-11-18 12:56:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-11-18 12:56:39,008 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:39,008 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:39,009 INFO L423 AbstractCegarLoop]: === Iteration 12 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:39,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:39,009 INFO L82 PathProgramCache]: Analyzing trace with hash -66745615, now seen corresponding path program 1 times [2018-11-18 12:56:39,010 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,010 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:39,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,010 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:39,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,038 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:39,039 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 45 with the following transitions: [2018-11-18 12:56:39,039 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [61], [76], [77], [78], [80], [81] [2018-11-18 12:56:39,040 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:39,040 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:39,092 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:39,092 INFO L272 AbstractInterpreter]: Visited 29 different actions 113 times. Merged at 16 different actions 59 times. Never widened. Performed 509 root evaluator evaluations with a maximum evaluation depth of 4. Performed 509 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 8 fixpoints after 3 different actions. Largest state had 21 variables. [2018-11-18 12:56:39,101 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:39,101 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:39,101 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,101 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:39,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:39,115 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:39,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:39,160 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-11-18 12:56:39,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:39,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2018-11-18 12:56:39,206 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:39,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:56:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:56:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:56:39,207 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand 6 states. [2018-11-18 12:56:39,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:39,260 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2018-11-18 12:56:39,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:56:39,261 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2018-11-18 12:56:39,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:39,262 INFO L225 Difference]: With dead ends: 106 [2018-11-18 12:56:39,262 INFO L226 Difference]: Without dead ends: 106 [2018-11-18 12:56:39,262 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2018-11-18 12:56:39,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-11-18 12:56:39,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2018-11-18 12:56:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-11-18 12:56:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2018-11-18 12:56:39,268 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 44 [2018-11-18 12:56:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:39,269 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2018-11-18 12:56:39,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:56:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2018-11-18 12:56:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-11-18 12:56:39,270 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:39,270 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:39,270 INFO L423 AbstractCegarLoop]: === Iteration 13 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:39,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:39,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1587916961, now seen corresponding path program 2 times [2018-11-18 12:56:39,271 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:39,271 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:39,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,272 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-11-18 12:56:39,330 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,330 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:39,331 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:56:39,331 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:56:39,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,331 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:39,341 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:56:39,341 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:56:39,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:56:39,365 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:56:39,367 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-18 12:56:39,395 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2018-11-18 12:56:39,434 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:39,434 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 3, 3] total 11 [2018-11-18 12:56:39,434 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:39,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-18 12:56:39,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 12:56:39,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-11-18 12:56:39,435 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand 10 states. [2018-11-18 12:56:39,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:39,543 INFO L93 Difference]: Finished difference Result 103 states and 111 transitions. [2018-11-18 12:56:39,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-18 12:56:39,543 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2018-11-18 12:56:39,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:39,544 INFO L225 Difference]: With dead ends: 103 [2018-11-18 12:56:39,544 INFO L226 Difference]: Without dead ends: 103 [2018-11-18 12:56:39,544 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2018-11-18 12:56:39,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-11-18 12:56:39,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2018-11-18 12:56:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-18 12:56:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2018-11-18 12:56:39,548 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 51 [2018-11-18 12:56:39,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:39,548 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2018-11-18 12:56:39,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-18 12:56:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2018-11-18 12:56:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-11-18 12:56:39,549 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:39,549 INFO L375 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:39,549 INFO L423 AbstractCegarLoop]: === Iteration 14 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:39,549 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash 979887946, now seen corresponding path program 2 times [2018-11-18 12:56:39,549 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:39,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:56:39,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:39,550 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:39,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-11-18 12:56:39,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:39,626 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:56:39,626 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:56:39,626 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:39,626 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 12:56:39,645 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:56:39,645 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:56:39,660 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-18 12:56:39,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:56:39,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:39,674 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 12:56:39,676 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:39,676 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 12:56:39,677 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:39,682 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:39,688 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 12:56:39,688 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:39,691 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:39,691 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2018-11-18 12:56:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 12:56:39,881 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2018-11-18 12:56:40,213 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2018-11-18 12:56:40,213 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 5] total 19 [2018-11-18 12:56:40,213 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:40,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-18 12:56:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-18 12:56:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:56:40,214 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 7 states. [2018-11-18 12:56:40,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:40,272 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2018-11-18 12:56:40,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 12:56:40,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2018-11-18 12:56:40,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:40,273 INFO L225 Difference]: With dead ends: 83 [2018-11-18 12:56:40,274 INFO L226 Difference]: Without dead ends: 83 [2018-11-18 12:56:40,274 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:56:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-18 12:56:40,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2018-11-18 12:56:40,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2018-11-18 12:56:40,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2018-11-18 12:56:40,277 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 55 [2018-11-18 12:56:40,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:40,277 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2018-11-18 12:56:40,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-18 12:56:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2018-11-18 12:56:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-11-18 12:56:40,278 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:40,278 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:40,278 INFO L423 AbstractCegarLoop]: === Iteration 15 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:40,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1320841748, now seen corresponding path program 2 times [2018-11-18 12:56:40,279 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:40,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:40,279 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:56:40,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:40,280 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 12:56:40,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:40,323 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:40,323 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:56:40,323 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:56:40,323 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:40,323 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/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 [2018-11-18 12:56:40,347 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:56:40,347 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:56:40,357 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 12:56:40,357 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:56:40,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:40,379 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2018-11-18 12:56:40,381 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:40,382 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 21 [2018-11-18 12:56:40,383 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:40,387 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:40,394 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2018-11-18 12:56:40,394 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:40,398 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:40,398 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2018-11-18 12:56:40,503 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-18 12:56:40,503 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-11-18 12:56:40,604 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:56:40,604 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [6] total 13 [2018-11-18 12:56:40,604 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:40,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:56:40,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:56:40,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:56:40,605 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 6 states. [2018-11-18 12:56:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:40,634 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2018-11-18 12:56:40,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 12:56:40,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 63 [2018-11-18 12:56:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:40,636 INFO L225 Difference]: With dead ends: 81 [2018-11-18 12:56:40,636 INFO L226 Difference]: Without dead ends: 81 [2018-11-18 12:56:40,636 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-11-18 12:56:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2018-11-18 12:56:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2018-11-18 12:56:40,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2018-11-18 12:56:40,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2018-11-18 12:56:40,638 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 63 [2018-11-18 12:56:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:40,638 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2018-11-18 12:56:40,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:56:40,639 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2018-11-18 12:56:40,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-11-18 12:56:40,639 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:40,639 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 12:56:40,640 INFO L423 AbstractCegarLoop]: === Iteration 16 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:40,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:40,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1293847241, now seen corresponding path program 1 times [2018-11-18 12:56:40,640 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:40,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:40,645 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 12:56:40,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:40,645 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-11-18 12:56:40,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:40,676 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:40,676 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 67 with the following transitions: [2018-11-18 12:56:40,676 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [9], [11], [13], [14], [17], [19], [23], [24], [28], [32], [35], [37], [39], [40], [43], [45], [49], [53], [58], [59], [64], [66], [75], [76], [77], [78], [80], [81] [2018-11-18 12:56:40,678 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-11-18 12:56:40,678 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-18 12:56:40,745 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-18 12:56:40,745 INFO L272 AbstractInterpreter]: Visited 32 different actions 152 times. Merged at 16 different actions 91 times. Widened at 1 different actions 1 times. Performed 692 root evaluator evaluations with a maximum evaluation depth of 4. Performed 692 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 12 fixpoints after 2 different actions. Largest state had 22 variables. [2018-11-18 12:56:40,747 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:40,747 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-18 12:56:40,748 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:40,748 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/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 [2018-11-18 12:56:40,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:40,763 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-18 12:56:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:40,786 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 12:56:40,827 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:40,899 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-11-18 12:56:40,916 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-18 12:56:40,917 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 14 [2018-11-18 12:56:40,917 INFO L249 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-18 12:56:40,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-18 12:56:40,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-18 12:56:40,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2018-11-18 12:56:40,917 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 12 states. [2018-11-18 12:56:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:41,090 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2018-11-18 12:56:41,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 12:56:41,090 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2018-11-18 12:56:41,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:41,090 INFO L225 Difference]: With dead ends: 126 [2018-11-18 12:56:41,090 INFO L226 Difference]: Without dead ends: 123 [2018-11-18 12:56:41,091 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 120 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2018-11-18 12:56:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-11-18 12:56:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2018-11-18 12:56:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2018-11-18 12:56:41,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2018-11-18 12:56:41,094 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 66 [2018-11-18 12:56:41,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:41,094 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2018-11-18 12:56:41,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-18 12:56:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2018-11-18 12:56:41,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-18 12:56:41,096 INFO L367 BasicCegarLoop]: Found error trace [2018-11-18 12:56:41,096 INFO L375 BasicCegarLoop]: trace histogram [9, 5, 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, 1] [2018-11-18 12:56:41,096 INFO L423 AbstractCegarLoop]: === Iteration 17 === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION]=== [2018-11-18 12:56:41,096 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 12:56:41,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2015189722, now seen corresponding path program 2 times [2018-11-18 12:56:41,097 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-18 12:56:41,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:41,097 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 12:56:41,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 12:56:41,098 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-18 12:56:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 12:56:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-11-18 12:56:41,174 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:41,174 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-18 12:56:41,174 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-18 12:56:41,175 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-18 12:56:41,175 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 12:56:41,175 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/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 [2018-11-18 12:56:41,182 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 12:56:41,182 INFO L286 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-18 12:56:41,194 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-11-18 12:56:41,194 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 12:56:41,196 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 12:56:41,221 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:41,221 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 12:56:41,223 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 12:56:41,223 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,227 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,230 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:41,230 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 12:56:41,256 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:41,257 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 12:56:41,258 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 12:56:41,259 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,269 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,274 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:41,274 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 12:56:41,302 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:41,303 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 12:56:41,306 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 12:56:41,306 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,310 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,314 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:41,314 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 12:56:41,361 INFO L700 Elim1Store]: detected not equals via solver [2018-11-18 12:56:41,362 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2018-11-18 12:56:41,365 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2018-11-18 12:56:41,365 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,386 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-11-18 12:56:41,389 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2018-11-18 12:56:41,390 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:23, output treesize:15 [2018-11-18 12:56:42,343 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-11-18 12:56:42,343 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-18 12:56:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2018-11-18 12:56:42,394 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-11-18 12:56:42,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [7] total 13 [2018-11-18 12:56:42,394 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-18 12:56:42,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-18 12:56:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 12:56:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=117, Unknown=1, NotChecked=0, Total=156 [2018-11-18 12:56:42,395 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand 6 states. [2018-11-18 12:56:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 12:56:42,450 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2018-11-18 12:56:42,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-18 12:56:42,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2018-11-18 12:56:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-18 12:56:42,451 INFO L225 Difference]: With dead ends: 98 [2018-11-18 12:56:42,451 INFO L226 Difference]: Without dead ends: 0 [2018-11-18 12:56:42,451 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 182 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=43, Invalid=138, Unknown=1, NotChecked=0, Total=182 [2018-11-18 12:56:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-18 12:56:42,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-18 12:56:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-18 12:56:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-18 12:56:42,452 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 97 [2018-11-18 12:56:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-18 12:56:42,452 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 12:56:42,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-18 12:56:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-18 12:56:42,452 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-18 12:56:42,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 12:56:42 BoogieIcfgContainer [2018-11-18 12:56:42,457 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-18 12:56:42,457 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 12:56:42,457 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 12:56:42,457 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 12:56:42,458 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 12:56:35" (3/4) ... [2018-11-18 12:56:42,461 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-18 12:56:42,465 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-11-18 12:56:42,465 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2018-11-18 12:56:42,466 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-11-18 12:56:42,468 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2018-11-18 12:56:42,469 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2018-11-18 12:56:42,469 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-18 12:56:42,469 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-18 12:56:42,500 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_adc0b636-eda6-456d-b911-c3417bafa997/bin-2019/utaipan/witness.graphml [2018-11-18 12:56:42,500 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 12:56:42,500 INFO L168 Benchmark]: Toolchain (without parser) took 7993.14 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 323.5 MB). Free memory was 962.3 MB in the beginning and 1.2 GB in the end (delta: -256.4 MB). Peak memory consumption was 67.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:56:42,502 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:56:42,502 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.27 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 12:56:42,502 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.00 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 943.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. [2018-11-18 12:56:42,502 INFO L168 Benchmark]: Boogie Preprocessor took 21.45 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:56:42,503 INFO L168 Benchmark]: RCFGBuilder took 287.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. [2018-11-18 12:56:42,503 INFO L168 Benchmark]: TraceAbstraction took 7434.66 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -85.6 MB). Peak memory consumption was 81.2 MB. Max. memory is 11.5 GB. [2018-11-18 12:56:42,503 INFO L168 Benchmark]: Witness Printer took 42.79 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 12:56:42,504 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 186.27 ms. Allocated memory is still 1.0 GB. Free memory was 962.3 MB in the beginning and 951.6 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 17.00 ms. Allocated memory is still 1.0 GB. Free memory was 951.6 MB in the beginning and 943.6 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 21.45 ms. Allocated memory is still 1.0 GB. Free memory is still 943.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 287.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 156.8 MB). Free memory was 943.6 MB in the beginning and 1.1 GB in the end (delta: -189.6 MB). Peak memory consumption was 17.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7434.66 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 166.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -85.6 MB). Peak memory consumption was 81.2 MB. Max. memory is 11.5 GB. * Witness Printer took 42.79 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 16]: 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 - 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: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 43 locations, 8 error locations. SAFE Result, 7.3s OverallTime, 17 OverallIterations, 9 TraceHistogramMax, 2.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 514 SDtfs, 827 SDslu, 1073 SDs, 0 SdLazy, 1241 SolverSat, 145 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 2 DeclaredPredicates, 1187 GetRequests, 990 SyntacticMatches, 44 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=99occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.6s AbstIntTime, 8 AbstIntIterations, 1 AbstIntStrong, 0.8534451659451658 AbsIntWeakeningRatio, 1.0416666666666667 AbsIntAvgWeakeningVarsNumRemoved, 2.9583333333333335 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 17 MinimizatonAttempts, 159 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 1151 NumberOfCodeBlocks, 980 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 1640 ConstructedInterpolants, 242 QuantifiedInterpolants, 537058 SizeOfPredicates, 29 NumberOfNonLiveVariables, 1258 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 39 InterpolantComputations, 12 PerfectInterpolantSequences, 1226/1442 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...